please answer

QUESTION 14 In the "before and after and 3 regresion O' the entry domeaned the slope coolcients as the brat difference estimator the same slope coefficients estimate as the "entity-demeaned" estimator Ot including 1 459 individual and y variables ints estimate as the first difference estimator O'd thefuming i dummy vanrating for the s 49% individual effects as binary venables wi ants astrates as the first difference estimator OF All of the above 3 tone of ine above