How can I upgrade to First Class?

Hint 1 of 14:

You're not going to be lucky enough to find a free upgrade certificate to
first class.

Hint 2 of 14:

The only way to get an upgrade is to go through Marsinta.

Hint 3 of 14:

She sure has an attitude problem.

Hint 4 of 14:

Maybe you could fix it.

Hint 5 of 14:

She is just a robot, after all -- there are probably controls somewhere that
you could adjust.

Hint 6 of 14:

Look in the Sculpture Room (which you can only access once you're in Second
Class).  See what you find there.

Hint 7 of 14:

Do the shapes of the sculptures look at all familiar?

Hint 8 of 14:

They look kind of like the bots on the ship.

Hint 9 of 14:

In fact, one of them looks a bit like Marsinta.

Hint 10 of 14:

That's the third bot to your right after you've entered the room.

Hint 11 of 14:

Take a look at the dials on the left of your screen that appear when you
approach the sculpture.  They look a lot like the dials that appear when
you're talking to the bots.

Hint 12 of 14:

Try playing with the sculpture -- there are two controls that you can use.

Hint 13 of 14:

When you turn them, you should notice that one of the dials on the left of
the screen will move either to the very bottom or very top position.

Hint 14 of 14:

Those dials let you know what Marsinta's mood is.