The average weight of a group of female students is 58 kilograms and the variance is 25. The weight of a randomly selected female student (Z1,40 = 0.4192, Z0,40 = 0.1554, Z2,40 = 0.4918, Z0,80 = 0.2881).
a-) What is the probability of being between 60 and 65 kilograms?
b-) What is the probability of being between 62 and 70 kilograms?