having trouble solving this question,do not know how to find the parametric equation of the line AB.

Thank You

4. [10] (A) Find the distance from the point A = (1,2,5) t0 the point of intersection of the plane a: xy+3z=1 with line (AB) passing through the point A and the point B = (2, 2, 3) (B) Find the distance from the point B to the plane a