What does a sphygmomanometer measure?

Assertion : Blood pressure is arterial blood pressure.
Reason : Blood pressure is measured by a sphygmomanometer.

Arrange and select the following events in the correct sequence during the measurement of blood pressure by a sphygmomanometer.
$i.$ Pulsatile sound disappears.
$ii.$ Cuff is inflated to block the brachial artery by external pressure.
$iii.$ First pulsatile sound is heard indicating systolic pressure.
$iv.$ Pressure in the cuff is slowly lowered.
$v.$ Cuff is wrapped tightly around the upper arm.

What does an $ECG$ measure?

Systolic pressure is higher than diastolic pressure because...

What is blood pressure?