Which of the three RANS model types - algebraic, \(k-\epsilon\) RANS, or \(k-\epsilon\) URANS - would you use in each of the following problems? Assume that the Reynolds number is sufficiently high to justify the RANS approach.

a) Attached boundary layer at a long curved wall.

b) Three-dimensional flow within a cube driven by one wall sliding parallel to itself with constant speed (the lid-driven cavity flow).

c) Flow past a large truck moving with a constant speed.

d) Propagation of an atmospheric smoke plume from a forest fire.