Balance this redox equation in acidic solution and then in b

Balance this redox equation in acidic solution and then in basic solution. Please show all work to recieve points.

Au(s) + NO3-(aq) + Cl-(aq) -> AuCl4-(aq) + NO2(g)

Solution

Au(s) + 3 NO3^-(aq) + 6 H^+(aq) --- > Au^3+(aq) + 3 NO2(g) + 3 H2O(l)

Au^3+(aq) + 4 Cl^-(aq) --- > AuCl4^-(aq)

it is the addition of aqua regia to gold