Consider the following series of interacting identical tanks (read Section 6.4) Constant density A=2m2 qi=2m3/min initially Linear valve resistance R=2min/m2 a. (2 pt) Write down the transfer function models: qi(s)u2(s) and 1(s)2(s) b. (2pt) Write a SIMULINK code that simulates hi(t) and h2(t) when qi changes from 2m3/min to 5m3/min at time t=5. Note that h(t) and h(t) are NOT deviation variables. Simulate until t=20 minutes. c. (1 pt) Simulate h1(t) and h2(t) for sinusoidal qi with an amplitude of 2m3/min and a period of 2 minute. Simulate until t=20 minutes