could you show me the steps?

A game consists of tossing a fair coin 5 times. The player wins if he gets 3 or more heads and losses otherwise. (4.1) What is the probability of losing this game? (4.2) If you play this game 10 times, what is the probability of winning at least 5 times? (4.3) If it costs $15 to play the game each time, and the payoff for the win is $30, will you win or lose money if you play this game many times? Please explain