$/**$ TODO

$*$ Implement DAO method used add new investor to investor table and cap$-$table

EXAMPLE:

public function investor$($$first$\_$name, $last$\_$name, $email, $company$)\{$

$sql $=$ "INSERT INTO investors $($first$\_$name, last$\_$name, email, company$)$ VALUES $($:first$\_$name, :last$\_$name, :email, :company$)"$;

$stmt $=$ $this$->$conn$->$prepare$($$sql$)$;

$stmt$->$execute$([\text{'}$first$\_$name' $=>$ $first$\_$name, 'last$\_$name' $=>$ $last$\_$name, 'email' $=>$ $email, 'company' $=>$ $company$])$;

$result $=$ $stmt$->$fetch$($PDO::FETCH$\_$ASSOC$)$;

return $result;

$\}$