If (alpha, beta, r) is a vector of magnitude 49 and having the same direction as the vector (1,-27,-2), then
1) alpha = 1, beta = -27, r = -2
2) alpha = 49, beta = 0, r = 0
3) alpha = 0, beta = 49, r = 0
4) alpha = 0, beta = 0, r = 49