b) In a population of migrating American eels, mass is normally distributed. The mean mass of individuals is 1.5 kg and the standard deviation is 0.4 kg. What is the probability that a single individual sampled at random will have a mass greater than 1.8 kg?

c) for the eel population above, what is the probability that a random sample of 4 individuals will have a mean mass greater than 1.8 kg?

d) for the eel population in part b), what is the probability that four individuals sampled at random willallhave masseslessthan 1.8 kg?