The city of odessa, texas is building a wheelchair ramp to make their courthouse accessible for persons in a wheel chair. the americans with disabilities act (ada) requires that a wheelchair ramp have an angle of elevation of 4.8°. the ada guidelines also allow a maximum run of 30 feet of ramp before installing a rest platform. at the odessa courthouse, the ramp must rise 2.5 feet to reach the top of the steps. will they have to install a rest platform on their ramp?