need to figure out this program in MatLab. please run program before answering to make sure it works..thanks

Sawtooth Wave Assiqnment Part one 2 k-1 . Create a program which will calculate the first 40 terms of the infinite series. Plot the composite square wave (F(t)) Create a separate plot which overlays plots from just the first four (4) terms of the fourier series (all sine waves) . You may choose the period of this square wave - but plot it such that t spans two periods (eg. ta -T: small step: T)