The minimized boolean function $F(U,V,W,x)$ implemented by the following circuit is:

Note: $(V_{CC}$ is logic level $1,$ ground is logic level $0)$

$(U^{\text{'}}{V}^{\text{'}}+UV)W^{\text{'}}$

$(U^{\text{'}}V+U{V}^{\text{'}})W^{\text{'}}$

$(U^{\text{'}}V+U{V}^{\text{'}})(W^{\text{'}}x+W{x}^{\text{'}})$

$(U^{\text{'}}{V}^{\text{'}}+UV)(W^{\text{'}}{x}^{\text{'}}+Wx)$