a)Find a parametric equation for the line through the point(1,5,5) (1,5,5)and in the direction ofai+bj+ck b) Find conditions ona,b,c so that the line...

so that the line you found in part (a) goes through the origin. (Be sure you can give a reason for your answer.) Then use your work to give two distinct triples a,b,c that result in the line passing through the origin.