5. For polystyrene comprised of 80 links with a C-C bond length of 1.54A, with bond angles of
109o, and with rotational angles of 43 trans and 77 gauche, calculate;
(a) the fully extended chain length,
(b) the freely jointed chain root-mean-square end to end distance
(c) the bond angle-limited freely jointed chain root-mean-square end to end distance
(d) the bond angle and bond rotation-limited freely jointed chain root-mean-square end to end
distance.