in a set of 8080ACT scores, where the mean is 2323and the standard deviation is 4.694.69, (a) how many scores are expected to be lower than

in a set of 8080ACT scores, where the mean is 2323and the standard deviation is 4.694.69,

(a) how many scores are expected to be lower than 18.3118.31(one standard deviation below the mean)? (b) How many of the 8080scores are expected to be below 32.3832.38(two standard deviations above themean)?