A capacitor consist of two parallel plates of area 10cm^2 separated by 10um. The space is…

A capacitor consist of two parallel plates of area 10cm^2
separated by 10um. The space is filled with plastic with K=8.
A. If there are 5V between the plates, what is the electric
field between?
B. What is the capacitance of the capacitor?
C. What is the accumulated charge Q if the capacitor has 40V
across?
D. How many electrons does that correspond?