Co-ordinate of E1 and E2 are obtained by solving y=1 and x2+y2=4∴E1(−3,1) and E2(−3,1)co-ordinates of F1 and F2 are obtained by solving x=1 and x2+y2=4F1(1,3) and F2(1,−3) Tangent at E1:−3x+y=4Tangent at E2:−3x+y=4∴E3(0,4)Tangent at F1:x+3y=4 Tangent at F2:x−3y=4∴F3(4,0)And similarly G3(2,2)(0,4),(4,0) and (2,2) lies on x+y=4
