Oblig 2. Due by Thur 19 October, 14-14.15 hours: Exercise 4-3 in White, p. 329. Calulate particulary: i) the shear stress tau_wall at the wall, as function of the downstream position x. ii) calculate the drag force on the plate of length L. iii) plot in log-log plot: log C_D(L) vs. log Re. iv) compare your solution with that of the full Blasius eq. Hint: the calculations are similar to those presented in section 4-1.4 in the book. You may want to work out that before you start on the oblig.