Hey all! I was wondering if anyone is able to help me with this question please!

According to the Flat Mars Society, Mars is also a plane, given by the equation

4x + 3y -z = -3

a) Find a parametric equation of the line in which Earth intersects Mars.

b) How far away is Canberra, given by the point (5, 10, 13), from this line?

I can't figure it out!!

Thanks in advance!