Implementing a function using a mux and no gates at all

Question

Given the function \$f(w,x,y,z)=x'y'z'+w'xy' \$, where \$ '\$ means negation.
I was given this function from a mux \$2^3*3\$ - 8 inputs and 3 control lines.
In the original implementation \$y'\$ was connected to inputs 0,2,3,4, and the control lines were \$w,x,z\$ where w is the MSB, the rest are zeros.
I want to implement the same function using the same MUX, but without Not gates.
After trying everything I cant really point the problem here.

Answer 1

You can just use another mux to get \$\overline{y}\$ like so

^{simulate this circuit – Schematic created using CircuitLab}

or just use a 16-input mux with all four control lines