FRAME relay - Green, Amber and Red frames ?

[decodex]

HI I have this problem. I know how to figure this out for 1sec interval. But how would I go about 2 sec. interval. This is the problem :
A have a PVC with Access rate of 256Kbits/sec
CIR=32Kbits/sec
Bc=64Kbits
Be=64Kbits
Graceful discard =OFF

I have five frames within the 2 sec interval:
32 kbits
20 kbits
20 kbits
20 kbits
30 kbits

How many frames will be discarded ?
How many will be marked "Amber" ?
How many wil be marked "Green" ?

I am confused since I've never learned the 2 sec interval. Usally the CIR = Bc, in this case its different. How do I go about this problem.
Thank You in advance.
Peter