4. Considering that these polymers may be used to make biomedical implants, what about the ATRP and/or free radical polymerization chemistry may be a concern? What could you do to counteract this concern? a. What if there is some initiator left over? b. What if not all of the monomers are polymerized? c. What about the ions used in ATRP is a concern for biocompatibility? d. What solutions can you find in the literature to combat these problems