1) Find out if this line :

a = 1+2t

b = -1 +3t

c = -5t

and this plane:

a + b + c = 7

are either parallel, perpendicular, or neither.

2) Find the parametric and general form of this equation that passes through these points:

D = (3, 0, 0), E = (0, 3, 0) , F = (0, 0, 3)