Exercise #4: The factorial of a nonnegative n written as n! is defined as follows: n'= n*(n-1)*(n-2) * * 1 (for all values of n greater than 0) and 0! =1 For example 5' = 5*4*3*2*1 which is 120. Write a java program that reads a nonnegative integer and computes and prints its factorial. Use While loop statement. Exercise #5: Create a java program to draw the UAE flag in a textual form. Assume that the UAE flag is a rectangular shape flag in which its length is triple its width. Specifically, you need to place the character R (for red) in place of red part of the flag. Similarly, you need place the characters G (for green), W (for white), and B (black) in the right place in the flag. See flag below. The flag should be dynamic with the input width. Assume that width is a multiple of 3 and the minimum width is 3 Input is formatted as follows: Where N is the number of flags and Wi is the width of the ith flag Sample Inp Resultant Output 3 6 9