The supervisor of a dairy milk chocolate factory has observed the weight of each 32g chocolate bar is aprox normally distributed with a mean 32.2g and standard deviation of 0.3g.a) find the probability that if a customer buys one chocolate bar, that bar will weigh less then 32g.b)find the probability that, if a customer buys a pack of four bars, the average weight of the four bars will be less than 32g.c)explain the difference between the results in part a and part b.