Final answer:
The total payoff if the heart lab were funded in both the first and second years would be the sum of the payoffs received in each year.
Step-by-step explanation:
If the heart lab were funded in both the first and second years, the total payoff would be the sum of the payoffs received in each year. Let's say the payoff in the first year is $X and the payoff in the second year is $Y. The total payoff would then be $X + $Y.