The graph above shows the variation of voltage, V volts, with time, tseconds, for an electronic device which monitors heat transfer. It is knownthat the way V depends upon t is a sinusoidal oscillation about a non-zero meanvalue.

(a) From the graph work out

(i) theamplitude of the oscillation;

(ii) themean value of V;

(iii) theperiod of the oscillation, in seconds;

(iv) thefrequency of the oscillation, in cycles per second and in radians per second.

(b) If V(t) = M + Asin(omega[symbol wont show] t + alpha)

(i) writedown the values of M, A and omega ;

(ii) calculatethe value of alpha , in radians correct to 3 SF.