I am interested in the topological homogeneity of function spaces.

Question. Let $X$ be a Tychonoff space, $USC(X)$ be a space of upper semicontinuous functions on $X$ and $USC(X)^+$ be a space of non-negative upper semicontinuous functions on $X$.

1. Is the space $USC(X)$ topological homogeneity ?
2. Is the space $USC(X)^+$ topological homogeneity ?
3. $USC(X,[0,1])$ ?