According to Exercise 4.53 on page 121, weights of 1-year-old boys follow a normal distribution with mean 12 kilograms, standard deviation 2 kilograms. a. The lightest 5% weigh less than how many...

According to Exercise 4.53 on page 121, weights of 1-year-old boys follow a normal distribution with mean 12 kilograms, standard deviation 2 kilograms. a. The lightest 5% weigh less than how many kilograms? b. The lightest 25% weigh less than how many kilograms? c. The heaviest 50% weigh more than how many kilograms? d. The heaviest 3% weigh more than how many kilograms?