Answer A &B. Show excel formulas

A genetic experiment with peas resulted in one sample of offspring that consisted of 442 green peas and 166 yellow peas. a. Construct a 90% confidence interval to estimate of the percentage of yellow peas. b. Based on the confidence interval, do the results of the experiment appear to contradict the expectation that 25% of the offspring peas would be yellow? a. Construct a 90% confidence interval. Express the percentages in decimal form.