data; [7 4 3 6 5 5 6 7 6 6 4 6 3 5 5 4 4 6 7 6 0 7 6 8 5 6 6 5 6 5] YOU HAVE ONLY 30 MINUTES !!!! Question 3) Continues probability distribution (15%) The level of electricity follows uniform distrib

data; [7 4 3 6 5 5 6 7 6 6 4 6 3 5 5 4 4 6 7 6 0 7 6 8 5 6 6 5 6 5]

YOU HAVE ONLY 30 MINUTES !!!!

Question 3) Continues probability distribution (15%) 

The level of electricity follows uniform distribution between 170V and 240V.

a)     Find expected value and variance (4%)

b)    What is the probability that level of electricity will be above 200? (4%)

c)     The standard deviation of electricity is around 20V. Assume some level of electricity which is 1.5 standard deviation above mean what is the probability being below that number? (7%)

In all answers show your calculations (Except variance calculation in question 1. But full points will be given to the correct answer). 

 I need well explained answer !!!!