3. In the Driving Form worksheet, you will enter individual legs of a driving itinerary. The mileage between starting and ending cities is calculated in cell F6. Currently that cell displays an error value because no cities have been specified in cells D6 and E6. Revise the formula in cell F6 so that it displays a blank text string in place of an error value. . This form will use the AutoComplete feature to fill in the city names in cells Do and E6. There is no need to display the city names in rows 7 through 33 for AutoComplete to work. Hide rows 7 through 33 in the worksheet so that content does not distract the user. 5. Unlock cells D6 and E6. The data in cells Do and E6 need to have two validation rules created: a. The city names must be included in the list of cities. b. The total of the driving mileage in cell F6 and the value stored in the dist range name should be less than or equal to 350. In the range D6:56, create a custom validation rule using the following formula: =AND(COUNTIF(cities,D6)=1,SUM($F$6,dist)