Please help me! Don't forget significant figures! SIG, SIG, SIG.

1. Two satellites in space, each with equal mass, are80.0 mapart from each other. If the force of gravity between them is2.88?10^?10 N, what is the mass of each satellite?

Remember sig figs

2. A block of mass m=2.50 kg is pushed a distance d=2.20 m along a frictionless, horizontal table by a constant applied force of magnitude F=16.0 N directed at an angle of 25.0 degrees below the horizontal as shown in the figure.

a) Determine the work done on the block by the applied force.

b) Determine work done by the normal force exerted by the table.

Remember sig figs