Solve the all parts of given question:
Question: The quantity of charge q (in coulombs) that has passed through a surface of area 1.95 cm2 varies with time according to the equation q = 3t3 + 7t + 6, where t is in seconds.
Part A: What is the instantaneous current through the surface at t = 0.950 s?
______A
Part B: What is the value of the current density?
______kA/m2
I want to know how to work this out step by step, not just the answer please.