please solve 4.2 for me thank you.

Question 4 (Gauteng September 2015) Mars has an average radius of 3 390 km and a mass of 6,39 x10" kg. Mars has two moons. 4.1 State Newton's Law of Universal Gravitation in words. (2) 42 If the gravitational force exerted by Mars on one of its moons with mass 1,08 x 10 kg, is 5,71x 10" N, calculate the distance between the centre of this moon and the surface of Mars. (6) Question 4 (Gauteng September 2014) The diagram below shows a planet Z and its two moons X and Y at right angles to each other. The average distance between the centre of the planet and moon X is 1496 km and the average distance between the centre of the planet and moon Y is %% (1496) km. 1 496 km Mx = 1,99 x 10"kg (1 496) km My = 2(1,99 x 10 ) kg Take the mass of X as 1, 99 x 10" kg, the mass of the planet Z as 5, 98 x1024 kg and the mass of Y as twice the mass of X. e gravitational force between moon X and planet Z. (4) the magnitude of the gravitational force that moon Y exerts on the anet Z. (2) Calculate the magnitude of the net gravitational force of the two moons on the planet. (2)