Givearecursivedefi of positive integers. [ hint: plot the points in the setin the plane and look for lines containing points in theset.] a) s = { (a, b) | a ∈ z + ,b ∈ z + , and a + b is odd } b) s = { (a, b) | a ∈ z + ,b ∈ z + , and a | b } c) s = { (a, b) | a ∈ z + ,b ∈ z + , and 3 | a + b slader

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.