One mole of an ideal gas undergoes two different cyclic process I and II, as shown in the P–V diagrams below. In cycle I, process \( a, b, c \) and \( d \) are isobaric, isothermal, isobaric and isochoric, respectively. In cycle II, process \( a', b', c' \), and \( d' \) are isothermal, isochoric, isobaric and isochoric, respectively. The total work done during cycle I is \( W_I \) and that during cycle II is \( W_{II} \). The ratio \( \dfrac{W_I}{W_{II}} \) is __________.
