$4.$ Using your answer from Question $3$ and the average of the selling prices for Model S and Model X $($pre$-$populated in template$),$ calculate a new average selling price per vehicle as the weighted average by model. Then, calculate a new expected revenue for $2019$ using this resulting average. This approach disaggregates revenue by model, which should yield a more precise expectation for total revenue. Based on the results of this revised approach, does Tesla$$s total automotive revenues appear complete and accurate in all material respects as of and for the year ended December $31,2019?$ Explain why or why not