According to the National Retail Federation, 34% of taxpayers used computer software to do their taxes. A sample of 125 taxpayers was selected. 4. What is the distribution of the sample proportion of the 125 taxpayers that used the computer software to do their taxes? a. N(0.34, 0.0424) b. N(0.34, 82.5) 5. What is the probability that between 28% and 40% of the taxpayers from the sample of 125 used computer software to do their taxes? a. pnorm(0.4,0.34,0.0424)-pnorm(0.28,0.34,0.0424) b. pnorm(0.4,0.34,125)- pnorm(0.28,0.34,125)