Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act

A)0.98N. B)62N C)44.5MN

Divide each of those weights (which are in units of newtons) by the acceleration of gravity (9.8 m/s^2) to get the mass in kg.

I do not know if your 44.5 MN in the third question is supposed to be 44.5 million Newtons, or a typing error.