Let $h$ be a continuous function on the closed interval $[1,6]$. A few values of $h$ are given in this table: $x$ | $1$ | $3$ | $4$ | $6$ :- | -: | -: | -: | -: $h(x)$ | $-5$ | $-2$ | $2$ | $-5$ **Which intervals *must* contain a solution to $h(x)=0$ ?** [[☃ radio 1]]