The following estimated regression equation based on 30 obsevation was presented y^=17.6+3.8x1−2.3x2+7.6x3+2.7x4 The values of SST and SSR are 1,805 and 1,754 , respectively. (a) Compute R2. (Round your answer to three decimal places.) R2= (b) Compute Ra2⋅ (Round your answer to three decimal places.) Ra2=