It belongs to Statistics. Please explain with definition

7. A recent survey in Business Administration Department in Ajou University revealed that 60% of the vehicles traveling on highways, where speed limits are posted at 1 10 km per hour, were exceeding the limit. Suppose you randomly record the speeds of ten vehicles traveling on Kyung Bu highway where the speed limit is 1 10 km per hour. Let .\\' denote the number of vehicles that were exceeding the limit. a) Find the probability that ten vehicles exceed the limit. (5 points) b) Find the expected number and the standard deviation of vehicles that are traveling on Kyung Bu highway and exceeding the speed limit. (5 points) S. The sales volume of Ice-cream at the Ajou mart is as follows. Seek and explain the coefficient of correlation between the icecream sales and the highest temperature of day. (10 points) the highest temperature of Ice cream sales day 19 50 15 35 22 44 29 60 20 55 The recent average starting salary for new college graduates in IT systems is $47,500. Assume salaries e normally distributed with a standard deviation of $4,500. What is the probability of a new graduate receiving a salary between $45,000 and $50,000? (5 ints) What is the cutoff for the bottom 5% of the salaries? (5 points)