2. Is it fair for Psyche to get help in completing her assigned tasks?
I do believe it was fair for Psyche to get help in her tasks considering Venus designed not to test Psyche but to make her so tired that she would lose her beauty. It was not fair to begin with, so Psyche's aid was just leveling the playing field.
4. Do you think it's fair for Cupid to expect Psyche not to be curious about what he looks like? Is it wrong for Psyche to take a peek? Why, or why not?
I do not believe it was terribly unfair for Psyche to be ordered not to look at Cupid, but nor do I think it was wrong for Psyche to peak. Cupid required the relationship to have trust and that was a relatively simple way to establish that Psyche trusts him. However, Psyche truly feared for her life when she looked at Cupid. It would be foolish of her to not have not looked and potentially have gotten herself killed.