An instrument to measure the acceleration of gravity on Mars is constructed of a spring from which is suspended a mass of 0.24(kg). At a place on earth where the local acceleration of gravity is 9.80(m)/(s) 2, the spring extends 0.61(cm). When the instrument package is landed on Mars, it radios back the information that the spring is extended 0.20(cm). What is the Martian acceleration of gravity?