beginner java

1. (Factorials) Write an application that calculates the factorial of 20, and display the results. Note: 1) The factorial of a positive integer n (written n/) is equal to the product of the positive integers from 1 to n. 2) Use type long. 2. (Largest and Smallest Integers) Write an application that reads five integers and determines and prints the largest and smallest integers in the group. Use for loop