State the recommended nominal maximum size of coarse aggregate for the following reinforced concrete components.

 (a) Figure 1 shows a reinforced concrete slab. The top cover and the bottom cover is 30 mm. 

(b) Figure 2 shows a reinforced concrete square column cross-section with a side length of 500 mm. Assume the 12 vertical reinforcement bars are spaced equally within the column cross section. The clear cover to the vertical reinforcement is 25 mm. 

(c) Figure 3 shows a reinforced concrete circular column with a diameter of 500 mm. Assume the 8 vertical reinforcement bars are spaced equally along the column circumference. The clear cover to the stirrups is 25 mm.

mm120mm e 10mm 0 mm ore Lsommea14 mme 4500 mem Figure 1 (All dimensions are in mm)