You design a special pendulum (you can treat it as a simple pendulum) to measure the mass of a planet. A satellite is sent to planet Zog and when it lands you measure that the oscillation frequency of the pendulum is 2.5 times larger on Zog than on earth. Other measurements indicate that the radius of Zog is 0.8xRE ( the radius of earth). What is the gravitational acceleration of Zog in terms of the earth's acceleration, g?