Typically, weekly sales will drop off rather quickly after the end of an advertising campaign. This drop in sales is known as sales decay. Suppose that the gross sales, S, in hundreds of dollars, of a certain product is given by the exponential functionUpper S left parenthesis t right parenthesis equals 5000 left parenthesis 2 Superscript negative 0.5 t Baseline right parenthesisS(t)=500020.5twhere t is the number of weeks after the end of the campaign. Answer the following questions.Question content area bottomPart 1a) What was the level of sales immediately after the end of the ad campaign whentequals=0?