Consider the circuit diagram below. [Answer in 2 significant figures] Sub-circuit abcd a b A1 R6 R2 R3 Ry 13 0 9 V 120 RA 8 V a) [12 pts] What is the equivalent resistance for the sub-circuit abcd? [branch bc and branch ad are parallel branch] b) [4 pts] Redraw the whole circuit with the equivalent resistance found in part a) to replace the sub-circuit abcd. c) [18 pts] Using Kirchhoff's Law, find the magnitude and direction of current (to the left or to the right) through Ammeter A1 and A2. d) [6 pts] What is the power dissipated by the equivalent resistance found in part a)