Hi, could you please explain with further details the following questions:

1. Identify and describe three general situations when an officer can arrest a suspect without an arrest warrant:

• They have caught a person in the act of committing an offence
• They believe, on reasonable grounds, that a person has committed an indictable offence (a more serious offence, such as sexual assault or robbery).
• They believe, on reasonable grounds, that a person is about to commit an indictable offence.

Could you please explain each of it.

2. Could you please explain the section 494 of the Criminal Code of Canada with further details. Thank you!