JAVA Please answer the following questions to the best of your ability. Thanks! (Please try to answer all 4, but even if you do only 1,2 or 3, thats okay.)

1. In the space below, you will complete a static method multiplesof which takes two int parameters, number and count. The method body must return an int array containing the first count multiples of number. For example, multiplesof (5, 4) should return the array { 5, 10, 15, 20 } multiplesof (11, 3) should return the array { 11, 22, 33 } multiplesof(1, 15) should return the airay { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } You must not use System.out.print or System.out.println in your method. Complete the method in the space below: //type your code here 2. In the space below, you will write a method reverseArray that takes as input an int array and -- leaving the original array unchanged -- constructs, fills, and returns a new array with the order of elements reversed. For example: If we declare: int[] arr = { 1, 2, 3, 4, 5 }; then reverseArray(arr) should return the array { 5, 4, 3, 2, 1 } reverseArray ( { 0, -1, 6, -1, 6}) should return the array { 6, -1, 6, -1, 0 } reverseArray ( {0}) should return the array { O}. You must not use System.out.print or System.out.println in your method. Complete the method in the space provided: //type your code here AP COMPUTER SCIENCE - UNIT 4 TEST SECTION II 3. In this problem, you will write part of a program to grade students. Suppose we have a String[] names array of student names, and a double [] grades array of student grades. We know that the grades array is the same length as the names array, and the value at grades[index] is the grade for the student named names[index]. Also suppose that a passing grade is 65.0 -- any grade less than this indicates fail, while greater than or equal to 65.0 indicates passing. We want to write a method printPassorFail which prints out all of the students names, and next to each, whether that student passed or failed. For instance, if we declare: String[] names = { "Vicki", "Christine", "Glenn" }; double[] grades = { 90.0, 90.0, 50.0 }; then printPassorFail (names, grades) prints out: Vicki: pass Christine: pass Glenn: fail If we declare String[] names = { "Bill", "Gavin", "Sam" }; double(l grades = { 65.0, 64.9, 0.0 }; then print PassorFail (names, grades) prints out: Bill: pass Gavin: fail Sam: fail Your method should not return any values, and you must use System.out.print and/or System.out.println in your solution. Write your solution on the following page. AP COMPUTER SCIENCE - UNIT 4 TEST SECTION II // Prints out student names along with "pass" or "fail" (depending on // whether the corresponding grade is less than or greater than 65). // Precondition: names.length == grades.length public static void printPassorFail(String[] names, double[] grades) { //type your code here AP COMPUTER SCIENCE - UNIT 4 TEST SECTION II 4. For this problem you will be modifying a multidimensional array. Pictures on a computer are usually stored as multidimensional arrays. One way to do this for black-and-white images is to break them down into tiny dots called pixels and make an two-dimensional int[] [] array of these pixels. Each element of the two-dimensional array indicates whether the pixel is dark (value 0), bright (value 255), or somewhere in between (any value 1 to 254). For example: int[] [] pixels = new int[] [] { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 0, 0, 0, 0, 0, 0, 0, 0, 255} { 255, 0, 0, 0, 128, 128, 0, 0, 0, 255 }, { 255, 0, 0, 0, 128, 128, 0, 0, 0, 255 }, { 255, 0, 0, 0, 0, 0, 0, 0, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } This array stores an image of a bright rectangle (see the 255 values around the outside) with a dark interior (all those 0 values in the middle) with a gray square in the center the 128 values). To make an image brighter, all we need to do is increase or add to the pixel values of the image. You will write a method brighten which will take an int[] [] pixel array and add a certain amount to every pixel of the array, up to a maximum of 255. (If adding an amount to an element would cause it to be greater than 255, it must be set to exactly 255). For instance, with the definition of pixels above, after the call brighten (pixels, 10); the array pixels should now contain: {{ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 10, 10, 10, 10, 10, 10, 10, 10, 255 }, { 255, 10, 10, 10, 138, 138, 10, 10, 10, 255), ( 255, 10, 10, 10, 138, 138, 10, 10, 10, 255 }, { 255, 10, 10, 10, 10, 10, 10, 10, 10, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }} Complete the method brighten on the next page. AP COMPUTER SCIENCE - UNIT 4 TEST SECTION II // Brightens the supplied image by adding amount to every // element of the pixels array, up to a maximum of 255. // Precondition: 0 = 0 public static void brighten (int[] [] pixels, int amount) { int numrows = pixels.length; int numColumns = pixels[0].length