In a sweepstakes sponsored by Gemini Paper Products, 200,000 entries have been received. If 1 grand prize is drawn, and 3 first prizes, 20 second prizes, and 500 third prizes are to be awarded, what is the probability that a person who has submitted one entry will win the following?
a) The grand prize (Round your answer to eight decimal places.)
b) A prize (Round your answer to four decimal places.)