Problem # : ruck A has two single axles. One axle weighs $12,000lb$ and the other weighs $23,000lb.$ Truck B has an $8000-$lb single axle and a $43,000-$Ib tandem axle. On a flexible pavement with a $3-$inch HMA wearing surface, a $6-$inch soil$-$cement base, and an $8-$inch crushed stone subbase, which truck will cause more pavement damage? $($Assume that drainage coefficients are $1\mathrm{.}0.)$

Problem # $2$: A flexible pavement has a $4-$inch 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 $5000l\frac{b}{i}n2.$ The pavement was designed with $90\%$ reliability, an overall standard deviation of $0\mathrm{.}4,$ and a $\frac{}{P}SI$ of $2\mathrm{.}0($a TSI of $2\mathrm{.}5).$ The drainage coefficients are $0\mathrm{.}9$ and $0\mathrm{.}8$ 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$)?$