You are a sales rep responsible for quoting a price for orders of paper. Normally, paper costs $5.00 per pack with a flat shipping cost of $7.99. If a customer orders a quantity of at least 20 packs of paper, the unit price will drop to $4.00. If a customer orders at least 10 packs of paper, the shipping becomes free for the customer.

Write a block of code that takes, as input from the user, the quantity of paper ordered and returns the final price including shipping.

java