Write a Java program to help a convenience store clerk decide whether or not to sell beer to a customer. Beer can only be sold to somebody who is 21 years old or more, and has enough money (beer costs $5.00). If the customer is too young, tell them how many years they must wait before returning. If they have too little money, tell them how much more is needed.
I know I need to do nested if else statements. Not asking you guys to do it just a general idea on how to do the math.