The roulette wheel at the casino has 38 spaces which are equally likely: 18 red, 18 black and 2 green. Each spin of the wheel results in one of the 38 outcomes. If a gambler places a $1 bet on red, and the wheel does not land on one of the red spaces, the gambler loses their dollar. If a gambler places a $1 bet on red, and the wheel lands on one of the red spaces, the gambler keeps their dollar and wins an additional dollar (a net gain of $1). You enter the casino and bet $1 on red for 80 spins of the roulette wheel.
a) At the end of the 80 spins, what is the probability you will make money?
b) At the end of the 80 spins, what is the probability you lose $5 or more?