In the following four periods     (i) Time of revolution of a satellite just above the earth’s surface  (Tst)(ii) Period of oscillation of mass inside the tunnel bored along the diameter of the earth  (Tma)(iii) Period of simple pendulum having a length equal to the earth’s radius in a uniform field of 9.8 N/kg  (Tsp)(iv) Period of an infinite length simple pendulum in the earth’s real gravitational field  (Tis)