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

Construct $\Delta ABC$ in which $BC = 7 \, cm$,$\angle B = 45^{\circ}$ and $AC - AB = 2 \, cm$. Write the steps of construction.

Construct an angle of $157.5^{\circ}$ and 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.

The construction of a triangle $ABC$,given that $BC = 3 \, cm$ and $\angle C = 60^{\circ}$,is possible when the difference of $AB$ and $AC$ is equal to: (in $cm$)

Construct a triangle $ABC$,in which $BC = 8 \, cm$,$\angle B = 75^{\circ}$ and $AB + AC = 15 \, cm$.