Question

The parametric vector form of the line l1 is given as r1 = u1 + rv1 (r is an element of the reals)
where u1 is the position vector of P1 = (1,1,−3) and v1=vector(P1P2) where P2 = (3,3,−2) .

The parametric vector form of the line 2 is given as r2 = u2 + sv2 (s element of real field) where 2 u is the position vector of P3 = (−2,0,2) and v2= −j− k

(a) Give the parametric scalar equations of the lines l1 and l2