the language programme is visual basic vb.net

1. Write a function that checks whether a number is Harshad or not. A Harshad number is an integer that is divisible by the sum of its digits. 2- Write a function that display " Capital "if an entered string starts with capital letter and display "Small" if it starts with small letter. 3- Write a function to check if a number is prime or not. 4- Write a function to check whether a given string has an odd or even number of characters. 5. Write a function to determine a given string if it starts and ends with the same letter then display "SSEL" else display "NSSEL