Coherent demodulation of FSK signal can be effected using

For a random variable 'X' following the probability density function, p (x), shown in figure, the mean and the variance are, respectively.

The maximum power efficiency of an AM modulator is

Given a unity feedback system with open loop transfer function, $$$G\left(s\right)=\frac K{s\left(s+1\right)\left(s+2\right)}$$$ The root locus plot of the system is of the form.