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)