40. FILE PrintTech Inc. is introducing a new line of ink-jet printers and would like to promote the number of pages a user can expect from a print cartridge. A sample of 10 cartridges revealed the following number of pages printed. 2,698 2,028 2,474 2,395 2,372 2,475 1,927 3,006 2,334 2,379 a. What is the point estimate of the population mean? b. What is the point estimate of the population standard deviation? c. What is the margin of error for a 95% confidence interval estimate? d. Develop a 95% confidence interval for the population mean.