Please answer 3 a) and 3 b)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

5. write an equation for the line that is parallel to the given line and that passes through the given point. y = –5x + 3; (–6, 3)