Random & Discrete Variable/ Continuous Probability Distributions

See attached files.

See attached Practice BusinessStatisticsfor Management and Economicsch 7 & 8. The answers are highlighted in yellow. I have difficulty setting up the steps in Excel to come up with the correct answers. I need to see how the answers are derived in Excel.

I have found the datarequired for problems 7.70 , 7.71 and 7.72 and attached the excel file. I also added prob. 7.71.

Random and discrete variables and continuous probability distribution are examined.