Solve the all parts of given question:
Question: An air-filled parallel-plate capacitor has plates of area 3.00 cm2 separated by 2.00 mm. The capacitor is connected to a 3.0 V battery.
Part A: Find the value of its capacitance.
Part B: What is the charge on the capacitor?
Part C: What is the magnitude of the uniform electric field between the plates?
Please provide clear step by step solution with notes on concepts and equations being used.