If N is the number of sides of a closed traverse, then select the INCORRECT checks applied on a closed traverse
1
The sum of measured exterior angles should be equal to (2N + 4) right angles
2
The fore bearing of the last line should be equal to its back bearing ± 180° measured at the initial station.
3
The sum of measured exterior angles should be equal to the sum of measured interior angles
4
The sum of measured interior angles should be equal to (2N - 4) right angles