Solve this..

In a recent survey, 20 students were asked whether they wore masks in their recent visits to the shopping center. Their responses as yes (Y) or no [N] are provided below: YIYIN Y N Y YIN ler YINIY NY N YIN NI [a] What percentage of students did not wear mask during the last visit? (b) At 1% level of signicance. use six steps and p-value approach to test that more than 60% students did not wear mask