I need to find the probability that no one is in line and also that at least three people are in line so answers C & D please and thank you

My assigned number is 18, and my problems are below. 42. Page #266. Sect 6.1: Fifteen items or less: The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution. O P() 0 10 0 25 0.30 0.20 0.10 0.05 c. Find the probability that no one is in line. d. Find the probability that at least three people are in line