Hi, I'm unable to solve this two questions.

4- The length, X centimeters of swordfish may be assumed to be normally distributed with mean 48 and standard deviation 8. A fisherman captures one swordfish, determine the probability that the length of the swordfish is

(a) Exactly 60 cm

(b) Less than 60 cm

(c) Within 5% of the mean length

5- The mean length of Trees is 208.5 cm with a standard deviation of 2.5 cm. Assuming population to be normal

1. (a)Show that the probability of the length of a randomly selected tree being between 205 cm and 210 cm is 0.645.
2. (b)Ten trees are selected at random, calculate the probability that exactly 6 of these trees have lengths between 205 and 210