6.18 Consider airflow over a flat plate of length L = 1 m under conditions for which transition occurs at C x = 0.5m based on the critical Reynolds number, Rex.c = 5 × 105. (a) Evaluating the thermophysical properties of air at 350 K, determine the air velocity. (b) In the laminar and turbulent regions, the local con- vection coefficients are, respectively, hlam(x) = Clam x -0.5 and hturb = Cturb X -0.2 = where, at T = 350 K, Clam = 8.845 W/m³/2 • K, C turb 49.75 W/m¹.8.K, and x has units of m. Develop an expression for the average convection coefficient, ham (x), as a function of distance from the leading edge, x, for the laminar region, 0 ≤ x ≤ xc. (c) Develop an expression for the average convection coefficient, hturb(x), as a function of distance from the leading edge, x, for the turbulent region, x ≤ x ≤ L. (d) On the same coordinates, plot the local and average convection coefficients, h, and h, respectively, as a function of x for 0 ≤ x ≤ L.