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