Find the minimum tractive effort required for vehicle to maintain 70mph speed at 5%upgrade through an air density of 0.002045 slug/ft^3. Show all steps and unit conversion please

 

Problem 2: Determine the tractive effort A 2500 lb vehicle has a drag coefficient of 0.35 and a frontal area of 20 ft. What is the minimum tractive effort required for this vehicle to maintain a 70 mi/h speed on a 5% upgrade through an air density of 0.002045 - slugs/ft? Make sure to show detailed calculations in the PDF submission and follow correct homework instructions.