Find the mistake in three of these sentences.then correct the mistakes. 1.he told them invest in a good training course 2 she said that gaining the staff trust is important 3 they asked him how he deal with those proplem in his previous job

1.He told them to invest in a good training course
2 She said that gaining the trast staff trust is important
3 They asked him how to deal with those proplem in his previous job