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Solve the following problems given below:

Problem I: At what height above the earth is the free-fall acceleration 20 % of its value at the surface? Assume Rearth = 6.37 x 10⁶ m.

Problem II: What is the speed of a satellite orbiting at that height? Assume Mearth = 5.98 × 10²⁴ kg.

Please help for the above problems, completely confused!! Show each steps if possible, Thanks.

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