I got a question about probability.....

The probability that a tennis set will go to a tiebreaker is 14%. In 80 randomly selected tennis sets, what is the mean and std dev. of the number of tie breakers?

a) mean: 10.4; std dev: 3.1

b) mean: 10.4; std dev: 3.35

c) mean: 11.2; std dev: 3.10

d) mean: 11.2; std dev 3.35

Thanks everybody