For this activity, write a class called Lesson_17_Activity which includes the following methods:

public static boolean isSorted(int [] a) - returns true if the array a is in ascending order and false otherwise.

public static int binarySearch(int [] a, int b) - performs a binary search to determine if the value b is stored in a. If b is found, return the index of b. Otherwise, return -1.

Include both methods in a class called Lesson_17_Activity and paste the entire class into the code runner box below.