Reducing clauses with "both" , "each" etc.

1a- Romeo and Juliet

and Hamlet, both of which were written by William Shakespeare, are my two favourite plays of all time.

2a- The team is then asked three questions, each of which is worth five points.

Can I rewrite these sentences above as follows:

1b- Romeo and Juliet

and Hamlet, both written by William Shakespeare, are my two favourite plays of all time.

2b- The team is then asked three questions, each worth five points.