I have to find \$V_o\$ (voltage over \$R_3\$), \$I_o\$ (current through \$R_3\$) and the power absorbed by the 1 Ohm resistor in this circuit:
I used \$V=IR\$ to find the current through \$R_3\$ and \$R_1\$ to be 1A. Then I multiplied it by 3 Ohms to find that the voltage is 3V. After this, I found the voltage over \$R_2\$ to be 1V the same way. Then I subtracted the V over \$R_3\$ from V over \$R_2\$ to get 2V, which I answered for A.
I also said \$I_o = 1A\$. After this, I used \$P=I^2*R\$ to find the power absorbed by \$R_3 = 1W\$.
When I entered the values I got, I got parts B and C wrong, but I'm confused on how I got A right if I used Io to find \$V_o\$.