Process Dynamics .... I need to solution this question within less than half hour necessary and very urgently , please

The flowrate F of a steam through a control valve with equal percentage trim is given by the following equation: F = C, a*-1 Where: F is the flowrate in gallon per minute, Cr and a are constants set by the valve size and type. The valve stem position (x) is set by an the signal (y) of a pneumatic controller . The valve is approximately 1st order system. dx y - 4 Cv +x= dt The effect of the steam flowrate on the process temperature (T) is given by dT + T = Kp F 16 Tp at a. Derive the transfer function, (s) Y (S) Where, I and Y are deviation variables. b. Plot the block diagram. c. Is the system 1st or 2nd order system. d. Find the process gain