Choose all that are appropriate (Can choose more than 1 option)

1. Even if Pfizer have valuable patents developed in-house for its COVID-19 vaccine, they would not appear on the firm's balance sheet.
2. Companies in stable, predictable industries with reliable cash flows are likely to have low leverage.
3. Retail companies are likely to have relatively short receivables collection periods.
4. United Airlines, an airline, is likely to have high inventory turnover.
5. A firm's suppliers would be very interested in the firm's current ratio.