damn, this binomial probability is giving me probs now

its a binomial probability distribution

A study determines that 60% of the voters in a town intend to vote for the incumbent mayor. If a sample of 8 people is selected, the approximate probability that 6 of the 8 people surveyed intend to vote for the incumbent is

a. 0.21
b. 0.47
c. 1.28
d. 0.60

I'm not sure what numbers to plug into the formula