In the circuit shown, the threshold voltages of the pMOS (|V_tp|) and nMOS (V_tn) transistors are both equal to 1 V. All the transistors have the same output resistance r_ds of 6 MΩ. The other parameters are listed below.

Μ_n and μ_p are the carrier mobilites, and C_ox is the oxide capacitance per unit area. Ignoring the effect of channel length modulation and body bias, the gain of the circuit is ____________(rounded off to 1 decimal place).