solve question 1 and 2

1 If the number of customers arriving at a certain automobile service facility in a 10-hour working day is 5 on average, compute the probability that no customers will arrive in a 2-hour period. (Use dot (.) not comma(,) in your answer and use two digits after the decimal point.) Your answer 0.36 Find the probability that a person flipping a biased coin gets the first head on the third flip if probability of getting a head is 0.25. (Use dot (.) not comma(,) in your answer and use two digits after the decimal point.) Your answer 14.06%