Please verify the answers~ Thank you!

1. Which of the following is the x-intercept of the plane 2x-4z+1=0?

a) P(2,0,-4)

b) P(0,0,0)

c) P(-1/2,0,0)

d) P(0,0,1/4)

Answer is C.

2. Which of the following is not a direction vector for the plane 3x-2y-z+4=0?

a) v(3,-2,-1)
b) v(0,-2,4)
c) v(2,2,2)
d) v(2,4,-2)

I picked A.