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Question 2: (8 points) The accumulation of mass in a reactor is given by the ODE: vf = Qcin Qc Where V is the volume, c is the concentration and Q is the flow rate. It is given that: initial Cin= 50 mg/m?, Q = 5 m/min, V = 100 m, and co= 10 mg/m is the initial concentration at 1 = 0. OC Use Midpoint Method to find c, up to 1 = 50 min, with a step size of 5. The true solution of the given differential equation is: = Cin (1 - et - Plot the true, approximate solutions and the absolute true error on the same graph and comment on your results. Question 2: (8 points) The accumulation of mass in a reactor is given by the ODE: vf = Qcin Qc Where V is the volume, c is the concentration and Q is the flow rate. It is given that: initial Cin= 50 mg/m?, Q = 5 m/min, V = 100 m, and co= 10 mg/m is the initial concentration at 1 = 0. OC Use Midpoint Method to find c, up to 1 = 50 min, with a step size of 5. The true solution of the given differential equation is: = Cin (1 - et - Plot the true, approximate solutions and the absolute true error on the same graph and comment on your results