Spacecrafts, P and Q, have been deployed to orbit around the center of the Earth. Spacecraft P is moving at an altitude of 5.50$\times$10³ km, while spacecraft Q is at an altitude of 10.8$\times$10³ km. Determine the kinetic energies of P and Q, if their mass is 2.00$\times$10³ kg each. Assume the orbits are circular.

Hint: gravitational constant G = 6.67$\times$10^-11 Nm²/kg², mass of earth M_E = 5.98$\times$10²⁴ kg, radius of earth = 6.38$\times$10⁶ m