Assume that we are on Planet-I and a rocket of mass 4660 kg is projected vertically upward from the surface of this planet. It stops at a point 11287.5 km from the surface of the planet. The radius of this planet is 3750 km, the gravitational acceleration at the surface is 7.34 m/s2, and the gravitational constant 6.67259 × 10-11 N m2/kg2. Find the minimum initial velocity of the rocket such that it will escape the gravita- tional field of Planet-I.