Electronics question Determine the charge

[Nokesy459]

The current flowing in an electrical circuit is given by i=3t amperes where t=time in seconds. Determine the charge Q in coulombs passing between t=0 and t=4 seconds.
Note; charge Q=It Coulombs, where I=current in A and t=time in s

Please help!

 

[NascentOxygen]

First, sketch a graph of current vs. time