A sealed cylinder contains a sample of a monatomic ideal gas that undergoes the four-step thermodynamic cycle \(1 \to 2 \to 3 \to 4 \to 1\) summarized in the table below. In this representation, \(W\) represents the work done on the gas, and the first law of thermodynamics is defined as \(\Delta U = Q + W\).

Step	Process Type	\(\Delta U\text{ (J)}\)	\(W\text{ (J)}\)	\(Q\text{ (J)}\)
\(1 \to 2\)	Isobaric expansion	\(+900\)	\(-600\)	\(Q_{1\to 2}\)
\(2 \to 3\)	Isochoric cooling	\(-900\)	\(0\)	\(-900\)
\(3 \to 4\)	Isobaric compression	\(-300\)	\(W_{3\to 4}\)	\(-500\)
\(4 \to 1\)	Isochoric heating	\(+300\)	\(0\)	\(+300\)
Cycle	Complete cycle	\(\Delta U_{\text{net}}\)	\(W_{\text{net}}\)	\(Q_{\text{net}}\)

Which of the following correctly identifies the values of \(Q_{1\to 2}\), \(W_{3\to 4}\), and \(W_{\text{net}}\)?