a) Define the following types of signals i) random signals ii) deterministic signals b) Define the following signal measures i) average value ii) iii) iv) form factor v) peak factor c) An AC mains line has frequency 50 Hz, and an amplitude of240V, to which a DC voltage of 10 volts is added, so that the voltage swings between -230 to +250 V. find: i) average value ii) iii) iv) form factor v) peak factor d) Give signal interpretations for the following statistical averages i) X(t) ii) [X(t)] iii) X (t) iv) v) mean-square value root-mean-square value mean-square value root-mean-square value var{X(t)} var (X)