Coal is carries from a mine in west Virginia. The automatic hopper car is set to 78 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed, with mean u=78 tons and standard deviation =1.3 ton. A) what is the probability that one car chosen at random will have less than 77.5 tons of coal? Round your answer to four decimal places B) what is the probability that 33 cars chosen at random will have a mean load weight x of less than 77.5 tons of coal? Round your answer to four decimal places