1) Make a python function that calculates the area of a circle - Get input from the user - you need to pass the argument to the function - print the result. Formula - 3.14 * radius * radius - Use math module to get pi value - don't hard-code the 3.14 value in your code.

2) A certain paper order costs $5.00 per copy for orders of less than 20 copies, $3.25 for orders of 20-120 copies, and $1.90 per copy for orders of 121 copies or more. Make a function that returns a total price for the order.