please help this physics questions with clear steps , thank you very much .

5. (17 %)

(a) A 45 kg student sits on a Ferris wheel. The normal force experienced by the student is 580 N when the Ferris wheel is at its lowest point. The radius of the Ferris wheel is 10 m.

(i) Determine the net force acting on the student when the Ferris wheel is at its lowest point.

(ii) What is the speed of the Ferris wheel?

(iii) What is the normal force acting on the student when the Ferris wheel is at its highest point?

(b) Suppose the mass of the earth increases by 10% without any change in its radius. What would be the new weight of a student whose original weight is 600N?

(c) Suppose the radius of the earth becomes half of its original value without any change in its mass. What would be the new weight of a student whose original weight is 600N?

(d) Suppose a CD-ROM player can spin the disc 2400 times per minute. An ant has accidentally entered the CD-ROM player and stands on the outer edge of a CD. What is the centripetal acceleration experienced by the ant? Assume radius of CD is 4.5cm and mass of ant is 0.004 grams. Express your answer in terms of g, acceleration due to gravity