Please give an explanation for both part A and part B

Question 6 (Essay Worth 10 points) (03.02 MC) A football quarterback has 2 more chances to throw a touchdown before his team is forced to punt the ball. He misses the receiver on the first throw 30% of the time. When his first throw is incomplete, he misses the receiver on the second throw 10% of the time. Part A: What is the probability of not throwing the ball to a receiver on either throw? (5 points) Part B: What is the probability of making at least 1 successful throw? (5 points)