Consider the root locus of a unity feedback system which has open loop poles at s = -4, -6, -8 and open loop zeros at s = -5, -7. The net angle contribution of these poles and zeros at the point s = -7.5 on the real axis is:

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?