Answer:
Step-by-step explanation:
Given that the random variable X is normally distributed, with
mean = 50 and standard deviation = 7.
Then we have z= 
Using this and normal table we find that
a) 
b) When z=0.02
we get

c) 90th percentile z value =1.645
90th percentile of X 
270° clockwise rotation & 90° counterclockwise rotation
The equation would be:
3.50 + 0.15x
x represents each 'late day'