A new highway is to be constructed. Design A calls for a concrete pavement costing $80 per foot with a 16-year life; three paved ditches costing $4 per foot each; and four box culverts every mile, each costing $9 comma 000 and having a 16-year life. Annual maintenance will cost $1 comma 600 per mile; the culverts must be cleaned every four years at a cost of $500 each per mile. Design B calls for a bituminous pavement costing $40 per foot with a 8-year life; four sodded ditches costing $1.45 per foot each; and two pipe culverts every mile, each costing $2 comma 150 and having a 8-year life. The replacement culverts will cost $2 comma 350 each. Annual maintenance will cost $2 comma 700 per mile; the culverts must be cleaned yearly at a cost of $215 each per mile; and the annual ditch maintenance will cost $1.65 per foot per ditch. Compare the two designs on the basis of equivalent worth per mile for a 16-year period. Find the most economical design on the basis of AW and PW if the MARR is 10% per year.

Find: 1- The AW value for Design A is $ nothing/mi. 2- the PW value of design A. 3- the AW value of design B