Hiroshi Sato, an owner of a sushi restaurant in San Francisco, has been following an aggressive marketing campaign to thwart the effect of rising unemployment rates on business. He used monthly data...

Please answer all three subparts with explanation.

I will really upvote. Thanks

Extracted text: Hiroshi Sato, an owner of a sushi restaurant in San Francisco, has been following an aggressive marketing campaign to thwart the effect of rising unemployment rates on business. He used monthly data on sales ($1,000s), advertising costs ($), and the unemployment rate (%) from January 2008 to May 2009 to estimate the following sample regression equation: Sales, = 1011 + 004Advertising Costs-1-0.68Unemployment Rater a. Hiroshi had budgeted $540 toward advertising costs in May 2009, Make a forecast for Sales for June 2009 if the unemployment rate in May 2009 was 8.1%. (Enter your answer in dollars not in thousands.) Sales b. What will be the forecast if he raises his advertisement budget to $560? (Enter your answer in dollars not in thousands.) Šales c. Reevaluate the above forecasts if the unemployment rate was 84% in May 2009. (Enter your answers in dollars not in thousands.) Advertising Sales, 540 %24 560 %24