#QUESTÃO A pnorm(5098, mean=5084, sd=395)
pnorm(5049, mean=5084, sd=395)
0.5141368-0.4646969=
#QUESTÃO B
pnorm(5123, mean=5084, sd=395)
pnorm(5036, mean=5084, sd=395)
0.5393253-0.45164=