3.51. The tensile strength of a metal part is normally dis tributed with mean 40 pounds and standard deviation 5 pounds. If 50,000 parts are produced, how many would you expect to fail to meet a minimum specifi cation limit of 35-pound tensile strength? How many would have a tensile strength in excess of 48 pounds? 3.52. The output voltage of a power supply is normally distributed with mean 5 V and standard deviation 0.02 V. If the lower and upper specifications for volt- age are 4.95 V and 5.05 V, respectively, what is the probability that a power supply selected at random will conform to the specifications on voltage?