On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "Good"
Ans: 4

On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "You don't need it anymore with android lollipop update"
Ans: 2

On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "It is very useful to me"
Ans: 5

On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "9/10 could be darker"

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Ans: 4