Question

show that the equation of plane containing the line (y/b) +(z/c)=1,x=0,and parallel to the line (x/a) -(z/e)=1,y=0,(x/a) -(y/b)-(z/c)=1,and if 2d be the shortest distance show that (1/d^2)=(1/a^2)+(1/b^2)+(1/c^2)