4. {2.5pts} Find the point of intersection of the plane given by the equation: x+ y+ 42 =12 and the line given by the equation: {x,y,z} = {1,23} + :{2,1,3}. 3. Consider the plane S given by the equation 21: + 3}: 2.z = 4 , and consider the plane R given by the equation -4xy +42 = 3. {a} {lpt} Explain Why the planes R and S are parallel. {b} {lSpts} Find the exact distance between the planes R and .5