Ventricular pressure volume loops

Which sequence of events accurately describes the isovolumetric contraction phase of the cardiac cycle?

1: Ventricular pressure increases, the mitral valve closes, and the aortic valve opens.
2: The aortic valve closes, ventricular pressure decreases, and the mitral valve opens.
3: The mitral valve closes, ventricular pressure increases, and the aortic valve opens.
4: Ventricular volume increases, the aortic valve opens, and the mitral valve closes.