What is the codes that I have to write in visual basic for this question

B Tip On Your Own Write a program that gets a number from the user and determines if the number is positive, negative, or zero. Add IsNumeric to your code to make sure that the input is a number and to display a MessageBox if it isn't. Write a program to calculate a student's grade based on four test scores. Throw out the lowest of the four scores. Calculate the average and determine the student's grade based on the 90-80-70-60 scale. Display the average and the grade. e Wite multiple hoice question with four poable answers The user should enter an answer and receive feedback based on the answer. Incorrect answers should provide a hint and the correct answer should congratulate the user. Write a program to determine the user's credit rating. Have the user enter their credit score and, based on that, return the user's rating and the interest rate for a home mortgage. Credit scores are from 300 to 850. Summ