A fixed quantity of a monatomic ideal gas undergoes the cyclic process \(1 \to 2 \to 3 \to 1\) shown in the pressure-volume diagram. Step \(1 \to 2\) is an isobaric expansion at a constant pressure of \(300 \, \text{kPa}\), step \(2 \to 3\) is an isochoric depressurization to \(100 \, \text{kPa}\), and step \(3 \to 1\) returns the gas to state \(1\) along a linear path. What are the net work done by the gas during one complete cycle, \(W_{\text{net}}\), and the thermal energy transferred to the gas during step \(1 \to 2\), \(Q_{12}\)?