solution plz

Given a three sector income distribution model in which Y=C+I Yd=Y-T C=Co+bYd T=T+Ty Where I= 10=30, Co=85, b=0.75, t=0.2, and To=20 Find (a) reduced form (b) the numerical value of Ye (c) the effect on the multiplier if (t) is incorporated in the model