(sorting) Read a set of numberical grades from the keyboard into an array. The maximum number of grades to be entered is 50, and data entry should be terminated when a negative number is entered. Have your program sort and print the grades in descending order.

1. Write it with Bubble sort.

2. Write it with selecting sort.

Can any help me write this program i'm new to coding. two seperate program and please write comment so i know what the program doing. Thanks