Write True or False and give reasons for your answer.
An angle of $42.5^{\circ}$ can be constructed.

Draw a line segment $AB$ of $4 \,cm$ in length. Draw a line perpendicular to $AB$ through $A$ and $B$,respectively. Are these lines parallel?

Draw an obtuse angle and bisect it. Write the steps of construction.

Construct an angle of $7 \frac{1}{2}^{\circ}$ and write the steps of construction.

Construct $\triangle ABC$ in which $BC = 5\,cm$,$\angle B = 60^{\circ}$ and $AB + AC = 9\,cm$. Write the steps of construction.

Construct $\Delta PQR$ in which $QR = 6\,cm$,$\angle Q = 60^{\circ}$ and $PR - PQ = 1\,cm$. Write the steps of construction.