A chemical manufacturer wants to lease a fleet of 27 railroad tank cars with a combined carrying capacity of 546,000 gallons. Tank cars with three different carrying capacities are available: 7,000 gallons, 14,000 gallons, and 28,000 gallons. How many of each type of tank car should be leased? Let x, be the number of cars with a 7,000 gallon capacity, x₂ be the number of cars with a 14,000 gallon capacity, and x3 be the number of cars with a 28,000 gallon capacity. Select the correct choice below and fill in the answer boxes within your choice. OA. The unique solution is x₁ = x2 = and x3 = (Simplify your answers.) t+( ), x₂ = sts ), and x3 = t for OB. There are multiple possible combinations of how the tank cars should be leased. The combinations are obtained from the equations x₁ = (Simplify your answers. Type integers or simplified fractions.) OC. There is no solution.