Can you please show me how to solve?

A genetic experiment with peas resulted in one sample of offspring that consisted of 412 green peas and 156 yellow peas.

a. Construct a 95% 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?

1. Yes, the confidence interval does not include 0.25, so the true percentage could not equal 25%

2. No, the confidence interval includes 0.25, so the true percentage could easily equal 25%