Explain Hooke’s law and elastic moduli. And solve the problem: The following data refer to a circula

Explain Hooke’s law and elastic moduli. And solve the problem:
The following data refer to a circular bar subjected to a tensile test:
Diameter of bar = 25mm, tensile load= 45kN, Gauge length = 300mm,
Extension = 0.133mm, Decrease in Diameter = 0.0033mm.
Determine a Poisson’s ratio and Young’s Modulus of elasticity.