1. Which one of the following planes is orthogonal to the line described by 1*(t) = (1 t, 3 5t, 2 + 4t) '3 (a) m+3y+22=10 [d)3:15y+8z=5 (b}72:1:2y+z=0 (e) :I:5y+4z = 3 (e) None of the above