A series of drained direct shear tests were performed on a saturated clay. The results, when plotted on a Mohr diagram, gave c' = 10 kPa and tan ∅' = 0.5. Another specimen of this clay was consolidated to an effective pressure of 100 kPa. An un-drained direct shear test was performed, and the measured value of t ff was 60 kPa. What was the pore water pressure at failure? Was the specimen normally consolidated? Why?