Answer the following (internal choice):
a. Find the image A′ of the point A(1,6,3) in the line 1x=2y−1=3z−2 . Also, find the equation of the line joining A and A′ .
b. Find a point P on the line 1x+5=4y+3=−9z−6 such that its distance from point Q(2,4,−1) is 7 units. Also, find the equation of line joining P and Q .