What happens during diastole in the cardiac cycle?

$A$: Isovolumetric systole of a normal cardiac cycle is responsible for the opening of semilunar valves causing the blood flow into aortic aorta and pulmonary aorta.
$R$: During isovolumetric systole,intraventricular pressure increases as semilunar and $AV$ valves are closed and ventricles are contracting.

Identify the correct sequence of the cardiac cycle.

Calculate the cardiac output of an individual having $70$ heart beats/min with a stroke volume of $55 \ mL$.

Which of the following statements is correct about the given diagram of the cardiac cycle?

The duration of the ventricular diastole in a normal cardiac cycle is