need help with the following questions

Varatta Enterprises sells industrial plumbing valves. The following table lists the annual sales amounts for every salesperson in the organization for the most recent fiscal year. Salesperson Sales Amount ($1000) Salesperson Sales Amount ($1000) Joseph 148 Wei 466 Jennifer 231 Samantha 411 Phillip 548 Erin 299 Stanley 329 Dominic 322 Luke 294 Charlie 189 Lexie 195 Amol 212 Margaret 367 Lenisa 414 (a) Compute the mean (in $), variance, and standard deviation (in $) for these annual sales values. (Round your answers to the nearest whole number.) mean variance standard deviation $ (b) In the previous fiscal year, the average annual sales amount was $300,000 with a standard deviation of $95,000. Discuss any differences you observe between the annual sales amount in the most recent and previous fiscal years. The mean sales amount has increased |from the previous to most recent fiscal year. The amount of change is |tiny |compared to the standard deviation in either fiscal year. Therefore, there is a strong likelihood that this change is the result of simple randomness.Varatta Enterprises sells Industrial plumbing valves. The following table lists the annual sales amounts for every salesperson in the organization for the most recent scal year. Sales Ame-mt Salas anon Sales Amount ($1000) P ($1000) (a) Compute the mean (in $), variance, and standard deviation (in $) for these annual sales values. (Round your answers to the nearest whole number.) mean $ variance standard deviation $ Sale-person