Rob repairs a door for Howard. In return, Howard is supposed to pay Rob $$75$ on November $1$ at Howard's house. Which of the following would constitute legally sufficient consideration?

Choose matching definition

$1$

Howard pays Rob $$60$ on November $1$ but, after checking with Rob, brings payment to Rob's house.

$2$

Rob comes to Howard's house to collect the $$75$ on November $1,$ but Howard only has $$50.$ Rob tells Howard to forget the other $$25.$

$3$

Since this is an unliquidated debt, the only legally sufficient consideration is Howard's payment of $$75$ to Rob on November $1$ at Howard's house.

$4$

Since this is a liquidated debt, the only legally sufficient consideration is Howard's payment of $$75$ to Rob on November $1$ at Howard's house.