what are the equations of the asymptotes for the function y=tan((2pi)/4)x where 0<x<4

I have trouble with this style of question whether it be find the x intercepts etc.

I got the normal asymptotes (pi/2, 3pi/2, etc.)

Edit-b=pi/2

but if i multiply pi/2 by pi/2, 3pi/2 It gives me the wrong answer.

HOw do I solve these kind of questions?

Thanks.