4. Write a sequential search function to search a target value from an integer array a with number of elements. What is the complexity of your sequential search function? (15 Points) S. We Write a binary search function to search the target value t-19 from the following array and it will activations. What is the complexity of your binary search function? (15 Points) a -9 -5 -2 0 1 3 7 11 17 19 21 25 27 31 37 41 index 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15