Cenvate credit for cha services hired

Hi Dear Experts,

We are the manufacture & exporters.

The query 

a) can we take Cenvate credit for the service tax on clearing agents's services rendered by us for the exports of goods ?

b) can we also take the credit of service tax on GTA paid on outwards freight for the good exported ?

Will be thankfull, If you can also quote the relavant sections & rules

Thanks & Regards