Help me to do this question plz plz plz ​

Measure a and b and find their sum. how are the angles related?

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !