The le Hmwk4_Q3_5hell.xlsx contains data on prices of products for several of a chain store's locations, a discount schedule offered to customers depending on how much they spend, and commission rates of the salespeople at the various stores. Your job is to develop an invoice form- Specically, a) You should enter formulas into the grey cells so that whenever data are entered in the orange input cells, the formulas calculate automatically. b) Use data validation (Data->Data Validation] in cell B23 so that the user can choose a city from a list of cities where the chain has its stores. c) Use data validation to ensure that the number ordered is a nonnegative (0 or greater] integer {whole number)- d) Name your ranges, such as the discount table, the commission table, and the price table. Also use names for the "Total price before discount\