Behavior of Accumulation Functions Involving Area Practice Test

Let $A(x)=\int_{0}^{x} f(t),dt$. If $f(x)>0$ for $0<x<3$ and $f(x)<0$ for $3<x<6$, where is $A$ increasing?​

Suppose $S(x)=\int_{1}^{x} s(t),dt$ and $s(x)>0$ for $x>1$. Which must be true for all $x>1$?