Using the logic for computing the quantity supplied at prices of $10, $20, and $50, choose the answer that best describes Universal's supply curve. Group of answer choices Upward sloping supply that gets steeper as price increases Zero quantity supplied for prices less than variable cost, then quantity supplied equals fleet size for prices equal to or greater than variable cost. Zero quantity supplied until price greater than average costs, then upward sloping for higher prices.. Zero quantity supplied until price greater than average costs, then vertical at fleet size for higher prices