Consider the planes 1x+5y+5z=1 and 1x+5z=0
answer the following:
a) find the unique point p on the y-axis which is on both planes.
b) find the unit vector u with positive first coordinate that is parallel to both planes.
c) use parts (a) and (b) to find a vector equation for the line of intersection of the two planes, r(t) =?