Aflexible pavement has a 4-inch hot-mix asphalt (hma) wearing surface, a 7-inch dense-graded crushed stone base, and a 10-inch crushed stone subbase. the pavement is on a soil with a resilient modulus of 5000 lb/in 2 . the pavement was designed with 90% reliability, an overall standard deviation of 0.4, and a ? psi of 2.0 (a tsi of 2.5). the drainage coefficients are 0.9 and 0.8 for the base and subbase, respectively. how many 25- kip single-axle loads can be carried before the pavement reaches its tsi (with given reliability)?