1. You manage a coffee shop. Address the question regarding expectations regarding units of daily coffee sales at a coffee shop by calculating expected value E(x), variance Var(x), and standard deviation values as it relates to the following data.\ Day Daily Coffee Units Sales\ Sunday 485\ Monday 576\ Tuesday 475\ Wednesday 526\ Thursday 585\ Friday 451\ Saturday 402\ \ a. What is the expected number of units expected sold (E(x)) on any given day of the week?\ b. What does standard deviation tell us about our expectation of daily units sold? (Provide answer as a numerical value range.)