simple harmonic Oscillators:

At what frequency will a pendulum run on the Moon, where the acceleration due to gravity is 1.63m , if it oscillates with a period of 0.632s on earth?

Elasticity;

Calculate the force a piano tuner applies to stretch a steel piano wire by 5.00 mm, if the wire is originally 1.78 m long and its diameter is 0.850 mm. The Young's modulus for steel is 20.0 *10^10Pa?

please solve these 2 questions step by step. thanks