So I'm trying to solve this question and I am pretty sure I know what to do, (separate the integral into ?45?and?57?and solve them separately and add them together), but the program is saying that the answer is wrong, so I feel like I went wrong somewhere in my reasoning/math.

7 What is the value ofj; f (2:) do: where f: [4, 7] l> R is given by f($)_{2m2 if 4gwg5, 5m + 25 if 5 S :1; g 7 . (Hint: Remember that you can split the domain of integration into two sub-intervals to obtain one integral from 4 to 5 and another integral from 5 to 7 .) 4421'3