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A capacitor is constructed from 2 metal plates 45 cm x 45 cm, seperated by a...

A capacitor is constructed from 2 metal plates 45 cm x 45 cm, seperated by a gap of 5mm. The dielectric medium is air.  
a. Calculate the capacitance (express in nanofarads)
b. Find the dieletic contant for Mica. Calulate the capacitcance using the dielectric contant for Mica. Mica dielectric contant 3-6
c. What is the new area of the metal plates if the capacitance found in part a, remains the same?

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