C Program Help

1- Write a function that accepts the length and width of a rectangle and returns the area of the rectangle. Read the dimensions of the rectangle from the user in the "main" function.

2-Write a program that prompts the user "How many random numbers do you want to print?" and prints the random numbers in a rectangle with 10 numbers per row. Also read the range (maximum value) from the user.

3-Program that has two functions-

a) A neighborhood bakery sells bagels at $0.75 each. But if the customer buys 6 or more the price each is $0.60. Write a function that accepts a number for bagels purchased from a bakery and returns the cost of the bagel order.

b) Write a function that accepts a worker's hourly wage and hours and returns the total pay for the week. TIP : Federal law requires that hourly employees be paid "time and a half" for all work above 40 hours per week.