The points A,B,C and D represent the numbers Z1,Z2,Z3 and Z4.ABCD is rhombus;AC=2BD.if Z2=2+i ,Z4=1-2i,find Z1 and Z3Ans) POI of diagonals: (3-i)/2.Using concept of rotation:2(0.5+2i)/2z1 + i-3 = i/2Solving for Z1Z1 = -1.5i +5.5Now, using midpoint formula to get Z3Z3 + Z1 = 2(3-i)/2Z3=0.5i-2.5