Matlab program generating two sequences x1 [n] and x2 [n] pi and cos

Hy guys!

Can you help me with this little program please?

Create a MATLAB program that generates two sequences x1 [n] and x2 [n] defined as follows: x1 [n] = sin (pi * n / 17), for -15 <= n <= 25; x2 [n] = cos (pi * n / sqrt (23)), for 0 <= n <= 50; and represents the two sequences: -figure 1 - in the same coordinate system (on the same graph) -figure 2 - using two graphic mini-windows placed one below the other. Represent the two figures using the plot command and then the stem.

Thank you!