Solution to 1.

This steak is tender only if it's fatty, and if it's fatty then it's not good for me. I won't eat it unless it's good for me. Therefore, I won't eat this steak.

The first thing to note is that the 'it' here refers to 'this steak'. Given that, the basic statements are

T = This steak is tender.

F = This steak is fatty.

G = This steak is good for me.

E = I will eat this steak.

Substituting throughout, we get:

T only if F, and if F then not-G.

Not-E unless G.

Therefore, not-E.

This gives us: