I'm solving some exercises about integrals but I can't solve this one, can someone explain the step-to-step please?

Let $\phi:[a,b]\rightarrow\mathbb{R}$ be a function with a second derivative, where $f(0)=0$ and $f(\pi)=3$, calculate $\int\_{0}^{\pi}[f(t)+f''(t)]sin(t)dt$