Help me please, please make the answer simple and easy

How many square centimeters of wrapping paper will be used to wrap the shoe box?

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.

Why does the shape of the distribution of the weights of russet potatoes tend to be symmetrical?