a 2. You need to design a pavement that is subject to a uniform circular load of 9000 lb with a contact pressure of 100 psi. The pavement structure is as follows: 2" of a 12.5-mm HMA surface mix (E=425,000 psi). 4 of a 25-mm HMA base mix (E=450,000 psi). 6" of a subbase (E=30,000 psi). . The subgrade has a CBR of 4%. a. Develop an appropriate mechanistic model for the pavement. b. Compute the critical pavement responses (stress, strain or deformation at the critical location) necessary to evaluate cracking using a linear elastic analysis software. c. Compute the critical response necessary to evaluate subgrade rutting using a linear elastic analysis software. a 2. You need to design a pavement that is subject to a uniform circular load of 9000 lb with a contact pressure of 100 psi. The pavement structure is as follows: 2" of a 12.5-mm HMA surface mix (E=425,000 psi). 4 of a 25-mm HMA base mix (E=450,000 psi). 6" of a subbase (E=30,000 psi). . The subgrade has a CBR of 4%. a. Develop an appropriate mechanistic model for the pavement. b. Compute the critical pavement responses (stress, strain or deformation at the critical location) necessary to evaluate cracking using a linear elastic analysis software. c. Compute the critical response necessary to evaluate subgrade rutting using a linear elastic analysis software