How will you prepare Copper nitrate from nitric acid?

Write the balanced equation for the following conversions A, B,C and D.

Correct the following, if required:

${\mathrm{HNO}}_3$ is a strong reducing agent.

Correct the following, if required:

${\mathrm{NaNO}}_3$ gives ${\mathrm{NO}}_2$ and ${\mathrm{O}}_2$ on heating.

Correct the following, if required:

Constant boiling nitric acid contains $80\%$ nitric acid by weight.