Please help with these homework questions and explain thank you very much.

1. Suppose that airplane engines operate independently and fail with probability equal to 0.2. Assume that a plane makes a safe flight if at least one-half of its engines run. Determine whether a 4-engine plane or a 2-engine plane has the higher probability for a successful flight.

2. Find the probability of being dealt a bridge hand of 13 cards (out of 52 cards) containing 5 spades, 1 hearts, 4 diamonds, and 3 clubs.