If $\int_{-1}^{ 1} f(x) d x=4$ And $f(x)$ Is Even, And $\int_{-7}^{7} f(x) d x=10$

Short Answer

If $\int_{-1}^{ 1} f(x) d x=4$ and $f(x)$ is even, and $\int_{-7}^{7} f(x) d x=10$ ?what is $\int_{1}^{7} f(x) d x$ ?