Powers of share holder in private limited company

Hi ,

I am share holder in Private limited firmand we had purchase a land with the same private limited firm - We are having the 12.5% shareholding in the private firm - Now one of the director of the company is asking us to withdraw the share holding of the comany.

Queries :

1. Director has powers to ask the share holder for withdrawl?

2. Do we get the share in the land which is purchased on PVT limited firm after withdrawl of share holding?

3. What is the power of share holders in the PVT limited firm?

Regards,