Fill in the blanks to complete the steps for construction of angle.
Steps for construction:
A. Draw a ray QP.
B. Draw an arc by taking as________centre with any convenient radius, which intersects QP at point N.
C. Taking_______as the centre and the same radius as before, draw another arc which intersects the previous arc at point M.
D. Draw QM and produce it to point R.
∠ PQR is an angle of measure.