For R=2 ohms plot Va as a function of V1 and V2. For V1 and V2 are between 0 and 20 volts. Second part is to find the values of V1 and V2 that produce Va = 0 while minimizing the total power absorbed by the resistors (hint you may want a second plot of total power as a function of V1 and V2). R = 2 ohms V1 = 0:1:20 V2 = 0:1:20 Va = in terms of V1 and V2/=0 KCL at supernode As you can see I've already solved the first part. and here is the equations or KCL being applied at the supernode. I've also set Va equal to zero and solved getting 16 = V1 - V2. Now I'm at a loss as to how to proceed. The plotting part in Matlab is easy but I'm unsure how what the second part is even really asking. Any help would be greatly appreciated.