Using the standard design for a 12-bit RCA, a) determine the "exact delay" for the addition of Ox56d and 0x3d6 in terms of d, assuming all internal carries are initialized to 0. Show all the carry chains. Note that actual delay corresponds to the time from the input numbers are given to the time the final correct result is reached. b) In (a), determine the delay (in d) it takes to finalize each of the following values: (bit index is numbered from bit 0 to bit 11, following the format used in the lecture) i) c5 (carry-out of bit 4, also the carry-in of bit 5) ii) 86 (final sum of bit 6) iii) cg (carry-out of bit 7, also the carry-in of bit 8)