5) Determine the point of intersection between two lines L1:( (x-1)/1 ) = (y/-5) = ((z-5)/3) L2: ( (x+1)/2) = ( (y-10)/-10) = ((z+1)/6)

6) Determine the solution of the following planes 1: 2x-y+z+1=0 and 2: 2x-y+z+2=0

7) Determine the solution of two planes 1: 2x+y+6z=4 and 2: 2x-y+2z =0, then show your answer is on the plane with 3: 5x+3y+16z-11=0