In a growing industry, the mean number of hours of productivity lost by employees per week due to online social media engagement is 8 hours, with a standard deviation of 2.1 hours.

Note: Assume the population data is normally distributed.

Standard Normal Distribution Table

a. What is the probability that an employee will lose more than 10 hours of productivity due to online social media engagement?

P(X>10)=P(X>10)=

Round to four decimal places if necessary

b. What is the probability that 12 employees will lose more than 9 hours of productivity due to online social media engagement?

P(X>9)=P(X>9)=

Round to four decimal places if necessary