Answer:
The other person is correct but i will answer the first one as i am doing it right now.
Step-by-step explanation:
Note this is for any people in the future because I just realized this was posted in 2019..... anyway best of luck on yalls tests.
They should have "planned" to enter the harbor during high tide, evening. They should want to leave the harbor during low tide. They are better off going at one of the tides because of the water flow /or current.
Pls don't just copy and paste this... they might get you for plagiarizing.