An injection molding process for making auto bumpers leaves an average of 1.3 visual defects per bumper prior to painting. Let Y and Z be the numbers of visual defects on (respectively) the next two bumpers produced. Use an appropriate probability distribution and evaluate the following:
A) P[X=2]
B) P [Y > or = 1]
C)EX
d) Var X
E) standard deviation of X