1. In a soup factory, we take a random sample of 7 cans of tomato soup and measure their sodium content (in mg). The following are our observations. 520 515 516 517 519 521 513 (a) [1 mark] Find a 93.5% confidence interval for the true mean sodium content. Include your command and output. (b) [1 mark] Using your confidence interval in (a), decide if 514 is a reasonable esti- mate for u, the true mean sodium content. (c) [1 mark] What assumption do you need to make about the population of sodium content per can in order for the answers in (a) and (b) to be valid