A proposed steel bridge has a life of 50 years. the initial cost id $35,000, and the annual maintence cost is $12,000. the bridge deck will be resurfaced every 10 years (in years 10,20,30,ans 40) for $90,000, and anticorrosion paint will be applied every 5 years (in years 5, 10,15, ......,45) for $22,000. if the interest rate is 5%, what is the EAC?