Miranda Meadow, a Virginia senatorial candidate wants anestimate of the proportion of the

Miranda Meadow, a Virginia senatorial candidate wants anestimate of the proportion of the population who will support her inthe November election. Assume a 95% level of confidence.
Meadow wants the estimate to be within 0.04 of the true proportion.
Meadow’s political advisors have no estimate available for theproportion that will support her. 

a)How large a sample is required?
b)What sampling technique should be used to select such a sample?Explain.
c)Past surveys reveal that 10% percent of the voters in Meadow’s stateare willing to spend more than $1,000 on a fund raiser dinner. Meadow wantsto update this percentage. The new study is to use the 90 percentconfidence level. The estimate is to be within 1 percent of the populationproportion. What is the necessary sample size? 
d)Meadow’s advisors also want to determine the average cost of a 30-second TV ad within the state. What sample size must you take to be 96%confident that the results will be within $75 of the true mean cost per ad giventhat s = $771?