2. Using the Ybus modification procedure described in Lecture (Sec. 7.4) and assuming no mutual coupling between branches, modify the Ybus obtained in Prob. 1 to reflect removal of the two branches 1-3 and 2-5 from the circuit of Fig.1. j0.4 (2) j0.5 j0.25 j0.125 j0.5 eeee eeee j1.0 + (3) 1.10/0 4 j0.2 j1.25 + 0.90/-30° 1. Using the building-block procedure described in Lecture (Sec. 7.1), determine Ybus for the circuit of Fig. 1. Assume there is NO mutual coupling between any of the branches. j1.0 eeee j0.4 0000 j0.5 eeee 0000 j0.25 j0.125 0000 j0.5 0000 1.10/0° j0.2 Bj1.25 eeee 0.90/-30° Fig. 1 Values shown are voltages and impedances in per unit. Dots represent mutual coupling between branches unless otherwise stated in problems.