1. star pattern

Write a program that displays the following pattern:

*

***

*****

*******

*****

***

*

2.

Write a program that will ask the user to enter the amount of a purchase. The program should then compute the state and county sales tax. Assume the state sales tax is 4 percent and the county sales tax is 2 percent. The program should display the amount of the pur- chase, the state sales tax, the county sales tax, the total sales tax, and the total of the sale (which is the sum of the amount of purchase plus the total sales tax). Hint: Use the value 0.02 to represent 2 percent, and 0.04 to represent 4 percent.

3. Write a program that asks the user to enter three test scores. The program should display each test score, as well as the average of the scores.