Discrete time function Using a MATLAB

Hello,

Can someone help me with this question please ?

Graph the following discrete‐time functions: (a) ݃g[n]=10 ramp[n/2] , for -5<= n <=10         (b) ݃g[n]= ∑ m=0 to n cos ((2*pi*m)/12) u[m], for 0<= n <=36

[Geoff Hayes]

Ahmed - this seems a lot like homework. What have you tried so far?