2 basic 2-7 TD questions

[Slide]

1) Your dealt 278xx on the button and its folded to you. You raise and are called by the big blind who draws 2. DO you draw 2 or 3?

Same scenario except this time your in the small blind and its folded to you. Is this hand worth playing? If it is do you raise and draw 2 or 3?

2) Its raised in ep and you call in the big blind. You both draw 2. You improve to a strong 1 card 8 or 1 card 7. Is checking the right play here or is there any value in leading out?

Any advice appreciated