PLEASE EXPLAIN THE CODE BY COMMENYING BESIDE THE IMPOTANT LINE

1. A set of data(of 8 integers) will be input through the keyboard. Write a code to find out the mean and standard deviation of the dataset. 2. Write a C code to multiply two 33 matrices. 3. Write a C code to check whether the input string is a palindrome or not. [A palindrome is a word that reads the same backwards as forwards, e.g. madam]