hey guys, i've been asked to consider the helix:

r(t) = 4cos(pi x t)i + 3sin(pi x t)j + tk

where i, j and k are unit vectors in the x, y and z planes respectively and t is a parameter. i need to sketch it and calculate its length from (-4,0,1) to (0,3,5/2).

any help would be greatly appreciated