Pls help me solve homework

Data packets are sent through a noisy transmission line. They survive error-free with probability p = 0.9. A) Calculate the probability that at least 3 of the first 5 packets are sent error-free and state the name of the PMF you are using. B) Calculate the probability that the first successful transmission happens on or before the third transmission and state the name of the PMF you are using. C) Calculate the expected number of transmissions to the first error-free one. D) Calculate the probability that the second error-free transmission is on the fourth packet and state the name of the PMF you are using. E) Ten packets arrive and are given sequence numbers NV, ranging from 1 to 10 according to their arrival time. A data packet is randomly chosen from the group. What is the probability that the sequence number N is 5. F) What is the expected value of N