A wire delivers 12.0 C of charge in 4.0 s. What is the current in the wire

So we want to know what is the current in the wire if the wire delivers 12 C of charge in 4 s. By definition, I=Q/t, where I is the current, Q is the amount change that is going trough the wire and t is the time. So now we simply plug in the numbers: I=12/4=3 A. So the current flowing in the wire is equal to 4 A.