please complete question d

1. At the local athletics club, the expected number of people that can run 100 metres in under 13 seconds is 4.5 and the variance is 3.15. The data is Binomially distributed. a. Find the probability p [2 marks] b. Find the number of trials n [2 marks] c. Write the distribution in the form X~B(n, p) [1 mark] d. Find the probability that at least 3 people can run 100 m in under 13 seconds. [2 marks]