Primary Domain Controller crashed

Hi All,

We have one Primary Domain Controller on windows 2008 server Ent, and one is ADC running on Windows 2008R2 Std.

Suddenly Primary Domain Controller has crashed on which 3 FSMO roles were- Schema Master, Domain Naming Master and PDC  

And on ADC we have two FSMO roles- RID and Infrastructure Roles.

Please let us know how can we retrieve the three FSMO Roles on ADC which were running on Primary Domain Controller.

Please help.

Thanks

Sumit Boss