The general solution for the wave function for the electron

Question

The general solution for the wave function for the electron trapped in the infinite square well is

Ψ(x) = Asia (kx/L )+ B cos(kx/L)

where L is the width of the well.

(a) Using the boundary conditions that Ψ(x) = 0 at x = 0 and x = L determine the values for A and B, as well as k

(b) Determine normalization constant for the general solution by using the normalization condition _x=0∫^x=LΨ² (x) dx = 1.