This system has Loop Gain (L(s)) = G(s)*H(s) = 𝐾/((s)(s+2)(s+10)) with Gain Crossover Freq. (Wgc) = 4 rad/s; Phase Margin (PM) = 50 deg; Kv = 100;
You can modify the system specification by recalculate and make some changes on Matlab source code. Thank you, have fun!