A polymeric chain is composed of 350 repeating units of identical length. Calculate thefollowing parameters:a) Assuming a free chain with an end-to-end distance of 12.5 nm. Calculate the repeatingunit length (in Angstroms)b) Assuming a freely rotating chain (same number of repeating units: 350) with arepeating link length of 0.930 nm and a fixed bond angle of 109.5°. Calculate the end-to-end distance of the polymeric sample