Identify each statement as either causing an increase or a decrease in the production of restaurant and bar services during the coronavirus pandemic of 2020, and thus shifting the production possibilities frontier (PPF) outward or inward. Shifts PPF Outward Drag appropriate answer(s) here contactless transactions using smartphones installing barriers like sneeze guards and partitions shortage of cleaning supplies like paper towels devising a new system of curbside delivery Drag appropriate answer(s) here Shifts PPF Inward