Regarding consideration, the following questions can help determine whether there is a contract rather than a gratuitous promise:$1.$ Is the consideration past consideration?$2.$ Is the proposed consideration legal?$3.$ Is there consideration flowing in both directions?$4.$ Does it have value in each direction?$5.$ If not, is there an exception?Multiple ChoiceNumbers $1$ to $4$ are vital, $5$ is optional.Numbers $1$ and $2$ are optional, but a failure in $3$ or $4$ can be saved by $5.$Numbers $1$ and $2$ are vital, but a failure in $3$ or $4$ can be saved by $5.$Any one of numbers $1$ to $5$ determine there is a contract.Numbers $1$ to $5$ are vital, no exceptions.