Let $S_1:$  A function always has a local maximum between any two local minima.
$S_2:$ If a function is defined on [a,b] and continuous on (a,b), then it takes its extreme values on [a,b].
$S_3:$ Every continuous and bounded function on $\left(-\infty ,\infty \right)$ takes on its extreme values.
The number of statements among the $S_1,S_2,S_3$  which are always true for every function