Study the following information to answer the given questions: In a certain code, ze to ka gi is a. code for ‘must save some money’, je ka so ni si code for 'he made good money’, ni to da so is a code for 'he must be good’ and we so ze da is a code for 'be good save grace'
Which of the following is me code for 'must?
1) so
2) da
3) to
4) ni
5) cannot be determined

Explanation

3