An econometrican has estimated the inverse demand relation P=a+bQ+e and found that a^=40, b^=-2.75, a^=8, and b^=.75. the r squared is .88 1. compute the t statistics fir estimated coeffcients a^ and b^ 2. Determine whuch of the estimated coefficients are statistically different from zero( if any) 3. what does the r squared in the regression indicate? does the regression fit the data well