Step-by-step explanation:
1) the suggested function in the condition is hyperbola, that means
[tex]w_{min}(x)=w_{min}(x_{max}) \ and \ w_{max}(x)=w_{max}(x_{min});[/tex]
2) using this
[tex]w_{min}(x)=w_{min}(\frac{1}{7} )=7;[/tex]
[tex]w_{max}(x)=w_{max}(\frac{1}{12})=12.[/tex]
