Determining fluid flow through pipes and tubes has great relevance in many areas of engineering and science. The resistance to flow in such conduits is parameterized by a dimensionless number called the friction factor (). In 1944, Lewis Ferry Moody plotted the DarcyWeisbach friction factor against Reynolds number (Re) for various values of relative roughness (/D). This chart is commonly known as the Moody Chart or Moody Diagram (Figure 1). For turbulent flow (Re > 4000), the Colebrook equation provides a means to calculate the friction factor, as follows: + ( . + . ) = = Roughness (m), D = Diameter (m), Re = Reynolds Number Considering relative roughness = 0.025 and Reynolds number = 20000, determine the value of friction factor by using MS-EXCEL and the inbuilt solver available in MATLAB. Please mention clearly both the answers in the report. [3+2 = 5 Marks] Figure 1: Moody Chart Q2. Figure 2 depicts five interconnected reactors. Use mass balance equations under steady state (i.e., mass in = mass out) to formulate linear equations as a function of the concentrations (, , , , ). Use the inbuilt solver available in MATLAB to solve for these unknown concentrations. You may directly write in the report the Ax = b form and mention the answers obtained from the solver.