On Wednesday, in the last hour of the day only 20 customer calls were taken (where the probability a customer completes

[answerhappygod]

On Wednesday, in the last hour of the day only 20
customer calls were taken (where the probability a customer
completes the survey is still 60%).
a):Remi takes a random sample of 4 of the customers who called
in the last hour of Wednesday. Construct an appropriate probability
distribution for the number of customers in this sample who
completed the survey.
b) What is the probability that at least 3 customers in
this sample completed the survey?
c) Calculate the expected value and standard deviation for
the number of customers in this sample who completed the
survey.
d) What distribution did you use to answer this question?
What characteristics from the problem are relevant to the
distribution you have chosen?
e)Suppose instead that 100 customer calls were taken in the last
hour of Wednesday of which a random sample of 4 customer was still
taken. Giving reasons for your answer explain which distribution
would be most appropriate to model the number of customers who
complete the survey and why. (Note: you are not required to
calculate any probabilities for Task 3e)
I need all part answer with neat and clean wrting and steps