(Financial application: compute commissions) Write a method that computes the commission...

(Financial application: compute commissions) Write a method that computes the commission, using the scheme in Programming Exercise 4.39. The header of the method is as follows:

public static double computeCommission(double salesAmount)

Write a test program that displays the following table:

Ref:

(Financial application: find the sales amount) You have just started a sales job in a department store. Your pay consists of a base salary and a commission. The base salary is $5,000. The scheme shown below is used to determine the commission rate.

Your goal is to earn $30,000 a year. Write a program that finds out the minimum number of sales you have to generate in order to make $30,000.