3. Write an enhanced for loop within a method that multiplies all elements in a double[ array named factors, accumulating the result in a variable named product. 4. Write a loop within a method that counts how many elements in an array are equal to zero. The method will get an array as an argument and it will return an integer. Implement a main method for testing. 5. Write an array method that carries out the following task for an array of integers. Provide a test program. a. Swap the first and last elements in the array. b. Shift all elements by one to the right and move the last element into the first position. For example, 1 4 9 16 25 would be transformed into 25 1 4 9 16. c. Replace all even elements with 0