The following results were obtained from a liquid limit test on a clay using the Casagrande cup device.

Number of blows 6 12 20 28 32
Water Content (%) 52.5 47.1 43.2 38.6 37.0

a) determine the liquid limit of this clay
b) If the natural water conten is 38% and the plastic limit is 23%, calculate the liquidity index
c) Do you expect a brittle type of failure for this soil? Justify your answer..

Please Show all your work

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