(8) Let $A=\left\{a \mid a=2^{x} 3^{y} 5^{z}, x, y, z \in \mathbf{N}\right\}, B=\{b \mid b \in A, 1 \leqslant b \leqslant 10\}$, find the number of subsets of $B$ that include the elements 1 and 10.
(8) $2^{7}=128$