For the function $F(t) = \ln\!\left(t\right)$, let $f(t) = F'(t)$. Write the integral $\int_a^b\,f(t)\,dt$ and evaluate it with the Fundamental Theorem of Calculus.

$\int_{1}^{4}\,$ $\,dt =$
(Note that your answer must be exact, not a decimal approximation.)