Verify if the given ratios is a proportion. Put ⭐ if it is proportion and ⚪ if not. Show your solution. 1. 3:20 and 5:45 2. 12:7 and 36:21 3. 56/72 = 7/9 4. 6/7 = 57/48 5.8/12 = 18/27 ​