Please help me with this problem and explain your answer
 Sapling Learning Map Place the mechanical events of the cardiac cycle in order from the start of an initial atrial systole to the start of the next atrial systole. Initial atrial systole isovolumetric contraction start of atrial diastole and ventricular systole ventricular ejection start of ventricular diastole isovolumetric relaxation atrial ejection Next atrial systole Incorrect Whereas other events may also be out of order, you have not correctly identified the first event that occurs immediately following initial atrial systole. The atria contract during atrial systole, which forces blood out of the atria and into the ventricles. e Previous # Try Again O Next -el Exit-. O Previous # Try Again Next Exit 
Initial atrial systole
 Atrial ejection
 Start of atrial diastole and ventricular systole
 Isovolumetric contraction
 Ventricular ejection
 Start of ventricular diastole
 Isovolumetric relaxation
 Next atrial systole