ASSIGNMENT Use the \"Eu elDat a \" Excel file. Answer the following questions: (1) Develop an estimated regression equation that can be used to predict the fuel efficiency for highway driving given the engine's displacement, fuel type, and car size. {Hint Use the COMPACT class as a reference category. Use the REGULAR fuel type as a reference category. Use the =IF function in Excel to create dummy variables: =1F(logical_test, [value_if_true], [value_if_false]). The IF function returns one value if a condition you specify evaluates to TRUE, and another value if that condition evaluates to FALSE. For example, the formula :IF(B2:\"midsize\