26. The surface of many airfoils can be described with an equation of the form Thickness +a2(x / c)2+@y(x / ).a.(x / c)4] where t is the maximum thickness as a fraction of the chord length c (e.g. maxct). Given that m and 0.2m, the following values for y have been measured for a particular airfoil: x (m 0.15 y (m0.08909 0.09914 0.08823 0.06107 0.03421 0.35 0.5 0.7 0.85 Determine the constants ao-al, a2, , and a4 . (Write a system of five equa tions and five unknowns, and use MATLAB to solve the equations.) MATHLAB 22. A truss is a structure made of mem- 800 lb bers joined at their ends. For the truss shown in the figure, the forces in the 11 members are determined by solving 36ft the following system of equations Ficos 50F20 Fsin 50 4001200 lb -F2+F60 -Ficos 50 +F4+Fs cos 410 -F1sin 50F3 +F5 sin 41-800 0,-Fs cos 41- F6+F10 0 Fssin 41o+ F7-12000,-F4+ F+ F9 cos 37 0,-F-Fo sin 370 -F9 cos 37 4933 0, F9 sin 37 + F0 Write the equations in matrix form and use MATLAB to determine the forces in the members. A positive force means tensile force and a negative force means compressive force. Display the results in a table where the first column displays the member number and the second column displays the 400 lb ding