If q−a = \(\frac{1}{r}\) and r−b = \(\frac{1}{s}\) and s−c = \(\frac{1}{q}\),…

If q−a = $\frac{1}{r}$ and r−b = $\frac{1}{s}$ and s−c = $\frac{1}{q}$, the value of abc is _____.