EEEN 5303 Introduction to Power Energy Innovation and Smart Grid Q1: (25 pts) Homework Assignment #4 7.1. Using the building-block procedure described in Sec. 7.1, determine Yous for the circuit of Fig. 7.18. Assume there is no mutual coupling between any of the branches. j1.0 0000 j0.4 0000 j0.5 eеée 1.10/0° 0000 eeee j0.25 j0.5 j0.125 0000 0000 j0.2 eeee j1.25 0.90/-30° FIGURE 7.18 Values shown are voltages and impedances in per unit. Dots represent mutual coupling between branches unless otherwise stated in problems. Q2: (15 pts) 7.2. Using the Ybus modification procedure described in Sec. 7.4 and assuming no mutual coupling between branches, modify the Yus obtained in Prob. 7.1 to reflect removal of the two branches ①- ③ and ②- from the circuit of Fig. 7.18.