AP Calculus ABhardmcq1 ptIf ∫15f(x) dx=12\int_1^5 f(x)\,dx=12∫15f(x)dx=12 and ∫35f(x) dx=7\int_3^5 f(x)\,dx=7∫35f(x)dx=7, what is the value of ∫51f(x) dx+∫13f(x) dx\int_5^1 f(x)\,dx+\int_1^3 f(x)\,dx∫51f(x)dx+∫13f(x)dx?A.−7-7−7B.777C.−5-5−5D.555