3. Use Statkey to generate a sampling distribution of sample means using sample size n = 50 from the dataset NFLContracts 3e - (2019 in millions), which gives the yearly money values from the contracts of all National Football League players in 2019. a) If we assume that the dataset in Statkey of all players in the NFL in 2019 represents a population, give the value of & and describe the parameter in a complete sentence. Give the size of this population. Clearly label each value. b) Use Statkey to generate 1 sample of size 50. Give the sample mean value. Use correct notation for your value. Include a pic or screen shot of your sample generated in Statkey. c) Use Statkey to estimate the standard error for the sampling distribution of 2,000 sample means with sample size n = 50. Round to two decimal places. Include a picture of your sampling distribution generated in StatKey. d) Give a 95% confidence interval based on your point estimate in part b and your standard error in part c. Interpret the meaning of this interval in context in a complete sentence with correct units