Suppose that U.S. real GDP is expected to grow by 2.5 percent per year. (a). if real GDP is currently $7 trillion, what will the real GDP equal to in ten year?( b) 2.5 percent of $7 trillion is $0.175 trillion. if real GDP grows by $0.175 trillion per year, it will equal $8.75 trillion after ten years is your answer to part (a) greater than or less than $8.75 trillion? why?