Question: Two gamblers play a version of roulette with a wheel

Two gamblers play a version of roulette with a wheel as shown in the file S04_81.xlsx. Each gambler places four bets, but their strategies are different, as explained below. For each gambler, use the rules of probability to find the distribution of their net winnings after four bets. Then find the mean and standard deviation of their net winnings. The file gets you started.
a. Player 1 always bets on red. On each bet, he either wins or loses what he bets. His first bet is for \$10. From then on, he bets \$10 following a win, and he doubles his bet after a loss. For example, if he spins red, red, not red, and not red, his bets are for \$10, \$10, \$10, and \$20, and he has a net loss of \$10. Or if he spins not red, not red, not red, and red, then his bets are for \$10, \$20, \$40, and \$80, and he has a net gain of \$10.
b. Player 2 always bets on black and green. On each bet, he places \$10 on black and \$2 on green. If red occurs, he loses all \$12. If black occurs, he wins a net \$8 (\$10 gain on black, \$2 loss on green). If green occurs, he wins a net \$50 (\$10 loss on black, \$60 gain on green).

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