The Green party of Canada is planning on conducting a survey to estimate the proportion of Canadians that would support a move that would see all federal buildings powered without the use of fossil...

The Green party of Canada is planning on conducting a survey to estimate the proportion of Canadians that would support a move that would see all federal buildings powered without the use of fossil fuels by the year 2040. If they want to be sure of there estimate to a margin of error of 3% to a 90% confidence level, what minimum sample size should they use?