What is the difference between the following yields: coupon rate, current yield, and yield to maturity?

Question:

What is the difference between the following yields: rate, current yield, and yield to maturity?

Coupon
A coupon or coupon payment is the annual interest rate paid on a bond, expressed as a percentage of the face value and paid from issue date until maturity. Coupons are usually referred to in terms of the coupon rate (the sum of coupons paid in a...