How many electrons per second pass through a section of wire carrying a current of `0.7A`?

How many electrons per second pass through a cross-section of copper wire carrying 10^(-16) A current ?

How many electrons per sec pass through a cross-section of a copper wire carrying 10^(-15) ampere?

How many electrons per second pass through a section of resistance of 20Omega across which a potential difference of 64V is applied.