5. In relation to problem number 4. Supposing XYZ Corporation has 50 market stalls to operate. The City Government billed them PHP 100,000.00 for unpaid stall fees. XYZ wrote to the city treasurer that the bill of PHP 100,000.00 fees will just be set-off with their claim of services from the city because they are the one who built the market. Can the city treasurer refuse? Explain