Will upvote! Recall that:- If a closed-loop (CL) system is stable, then one may increase the gain (by up to a certain amount) and still maintain CL stability.- On the other hand, if the CL system is unstable, then one may decrease the gain (by up to a certain amount) and still have CL instability.You find that the gain margin of a nominal loop transfer function (with no right-half plane open-loop pole) to be -40 dB. Now answer the following:1) The closed-loop system is [Select: unstable/stable].2) One may increase (or, decrease) the gain up to [Select: 20, 10, 100] and still have CL stability (or, instability).**NOTE:** The second part is dependent on your answer to the first part, i.e.,- If you answered "stable" to part-1, you will read part-2 as "increase the gain by up to X and still have CL stability".- If you answered "unstable" to part-1, you will read part-2 as "decrease the gain by up to X and still have CL instability".

Given Data:A nominal loop transfer function with, The gain margin Asked to Find:1. Stability of the closed-loop system2. The value of the gain increased or decreased without losing stability.The stability of the closed-loop system can be identified with the gain and phase margins of the open-loop or the loop transfer function by the Bode plot.As the gain margin is negative, irrespective of the phase margin, the system is always UNSTABLE.The value of the gain decreased to meet the stability is,1) The closed-loop system is unstable.2. The value of the gain increased or decreased without losing the stability is .