3 variable Kmap into 2-1 Mux
Yes,it's right.You can use z as your selector pin.Here's how finally it's look like







simulate this circuit &ndash; Schematic created using CircuitLab

 If you give z=0,the top portion of K-map will be active.That is 00 and 11,for z=0,the output is 1.Similarly when z=1,the output F=1 for x=0 (after some simplifications)