Can you please clarify why the answer is not a$15.$ Given the following decision tree for a two$-$stage $($decision$)$ project to enter a joint venture, find the best alternatives $($among a$\_1-$a$\_6$ in the figure$)$ and their expected values. The outcomes shown are revenues and the investment expenses are in parentheses. Node $4$ represents the situation where alternative a$\_1$ was chosen, and then the top outcome with a $70$ percent probability occurred; note that there is no choice of alternative if the $30$ percent probability outcome occurred. Similarly with Node $5./$r$/$nGiven the following decision tree for a two$-$stage $($decision$)$ project to enter a joint venture, find the best alternatives $($among a$1-$a$6$ in the figure$)$ and their expected values. The outcomes shown are revenues and the investment expenses are in parentheses. Node $4$ represents the situation where alternative a$1$ was chosen, and then the top outcome with a $70$ percent probability occurred; note that there is no choice of alternative if the $30$ percent probability outcome occurred. Similarly with Node $5.$

Revenue

Question $2(5$ Points$)$:

What is the least favorable alternative?