[plt-scheme] Number of parameters

Hi all,

Is it possible to know given a function the maximum number of
parameters it is able to receive?
Or better yet, is it possible to know given a lambda if it is
going to give an error if passed a given number of parameters?

Best regards,
-- 
Paulo J. Matos : pocm(_at_)mega.ist.utl.pt
Instituto Superior Tecnico - Lisbon    
Software & Computer Engineering - A.I.
 - > http://mega.ist.utl.pt/~pocm 
 ---	
	Yes, God had a deadline...
		So, He wrote it all in Lisp!