In a laboratory consolidation test on a representative sample of cohesive soil, the original height of a doubly-drained sample was 25.4 mm. Based on the log time versus dial reading data, the time for 50% consolidation was 8.5 min. The laboratory sample was taken from a soil layer which is 14 m thick in the field, doubly drained, and is subjected to a similar loading. Determine:
(a) How long will it take until the layer consolidates 50%?
(b) If the final consolidation settlement is predicted to be 22 cm, how long will it take for a settlement of 6 cm to take place?