The new electric semitruck is equipped with a battery pack that has 75 kWh energy. The battery pack for the car is constructed from lithium cells with 3.75V and 20 Amp-hour charge.

a) Calculate the energy (Wh) of each lithium cell.

b)If the battery pack voltage is 375V, calculate how many cells must be connected in series to satisfy the battery pack voltage.

c) Calculate how many lithium cells are needed to satisfy the total energy of the battery pack.