In a closed traverse PQRST the following data were collected in the field. What is the correct sum of deflection angles for this traverse?
| Line | Length (m) | Bearing |
|---|---|---|
| PQ | 201.54 | 62°42' |
| QR | 189.68 | 154°54' |
| RS | 231.94 | 202°32' |
| ST | 272.55 | 281°44' |
| TP | 256.83 | 22°00' |
In supervised digital image classification, the number of combinations to be evaluated to select three best bands out of five bands is _____________