Calculators from Caseo Company and Sharpy Company has a mean life span that is normally distributed. Calculators from Caseo has a mean life span of 62 months with a standard deviation of 4 months....

Calculators from Caseo Company and Sharpy Company has a mean life span that is normally distributed. Calculators from Caseo has a mean life span of 62 months with a standard deviation of 4 months. Calculators from Sharpy ha a mean life span of 56 months with a standard deviation of 3 months. What is the probability that the sample mean life span of 64 calculators from Caseo will exceed the sample mean life span of 81 calculators from Sharpy by greater than 6 months? Round your answers to 4 decimal places.