Appreciate if someone can take the time to check my answers to the following question. If wrong, could you point me in the right direction.

A round bar, 800 mm long, CSA 15 mm^2 experiences an applied tensile load of 6 kN and stretches elastically by 3 mm.

a) Calculate the tensile stress in the bar.
My answer 400 MN/m^2

b) Calculate the strain on the rod.
My answer 0.00375 or 0.375%

c) Calculate the Modulus of Elasticity of the material.
My answer 106.67 GN/m^2

TIA

This should be the subject