The thermal efficiency of a Diesel cycle is given by the expression: pk 1 [KG = 1 - . 1 k(re 1). - wherer is the compression ratio, rc is the cutoff ratio, and k = 1.4 for air. Use MATLAB to determine the value of 1 for air when r= 10, and re = 3. A vector can be represented by either its rectangular coordinates (x and y) or by its polar coordinates (r and 8). For positive values of x and y, the conversion from rectangular to polar coordinates in the range from 0 to 2x are given by: r = x + y 0 = tan-(y/x) Use MATLAB to convert rectangular coordinates (x and y) to polar coordinates (r and 8). Test the code to find values of r and when x=3 and y = 4. Consider the slider-crank mechanism shown: b The displacements of the slider in the slider-crank mechanism shown above, is given by: s = a cos(p) + b (a sin() - -e) Plot the displacement s as a function of the angle o (in degrees) when a = 1, b = 1.5, e=0.3, and 0 360