You can upgrade your operating system only if you have a $32-$bit processor running at $1GHz$ or faster, at least $1$ GB RAM, and $16$ GB free hard disk space, or a $64$bit processor running at $2GHz$ or faster, at least $2GB$ RAM, and at least $32GB$ free hard disk space. Express you answer in terms of $u$ : "You can upgrade your operating system," $b_{32}$ : "You have a $32-$bit processor," $b_{64}$ :

"You have a $64-$bit processor," $g_1$ : "Your processor runs at $1GHz$ or faster," $g_2$ : "Your processor runs at $2GHz$ or faster," $r_1$ : "Your processor has at least $1$ GB RAM," $r_2$ : "Your processor has at least $2$ GB RAM," $h_{16}$ : "You have at least $16$ GB free hard disk space," and $h_{32}$ : "You have at least $32$ GB free hard disk space."