59. Consider the circuit of figure P6.59. Without writing and solving simultaneous equations, find va by utilizing the re- sults of problem 6.57 and all the theorems studied so far. Hints: 45 +27 45 +27 45-27 (i) [45 27]= 2 2 2 2 = [36 36] + [99]: (ii) if you solved problem 6.57, then can you use linearity to obtain the answers directly? I 45 V W 10 + Figure P6.59 my