#QUESTÃO A pnorm(5098, mean=5084, sd=395)

pnorm(5049, mean=5084, sd=395)

0.5141368-0.4646969=0.46469690.45164

#QUESTÃO B

pnorm(5123, mean=5084, sd=395)

pnorm(5036, mean=5084, sd=395)

0.5393253-0.45164=0.46469690.45164