Question on capacitor?

Question

An air-filled parallel-plate capacitor with plate separation d and plate area A is connected to a battery which supplies a voltage V between plates. With the battery left connected, the plates are moved apart to a distance of 10d. Determine by what factor each of the following quantities changes:
a) V
b) capacitance, C
c) electric field, E
d) electric flux density, D
e) charge, Q
f) charge density
g) energy stored, U

Thanks ag for the reply, it seems the electric field inside the capacitor will decrease right? since V = Ed and V is constant.

Answer 1

a) does not change
b) C-C/10 = 9C/10
c) same
d) same
e) decreases by 9/10 th
f) decreases by 9/10 th
g) decreases by 9/10 th