Answer:
a. This behaviour will decrease the AD. This is because as people will start saving more, they will spend less. Due to this, AD curve will shift backwards or AD will decrease.
b. If people start saving more, they will consume less. Thus, the consumption component will reduce.
c. This will change the saving habits. This is because people will become aware of the fact that they need to save for their old age because the social security system will not be enough to meet their demands.