The 8255 Programmable Peripheral Interface is used as described below. (i) An/A D converter is interface to a microprocessor through an 8255. The conversion is initiated by a signal from the 8255 on Port C. A signal on Port C causes data to be stobed into Port A. (ii) Two computers exchange data using a pair of 8255s. Port A works as a bidirectional data port supported by appropriate handshaking signals. What will be the appropriate modes of operation of 8255 Interface for (i) and (ii)?