Doubt in Vectors

1) A wheel with a radius 45 cm rolls without slipping etc. At time t1 a painted pt p is at the bottom of the wheel in contact with the floor. At a time t2, The wheel has rolled thru 1 half revolution.What are
a)Magnitude
b)angle of displacement
of p?

2) A woman walks 250m in the direction 30 degree east of north, 175m directly east. Find
a)Magnitude
b)Angle of
her final displacement?