A RS232 data frame is a group of data bits for communicating one character in ASCII code. There are few items/bits in a data frame: a. Data bits (D_7 D_6 .. D_1 D_0) with D_7 being the MSB. b. Start bit c. Stop bit(s) d. Parity bit Answer the following questions: (1) When data bits D_7 D_6 .. D_1 D_0 being transmitted over an RS232 serial interface, which bit will be transmitted first and which bit last? (2) In the data frame, give the transmitting sequence of the four items (a, b, c, and d) listed above by indicating the order as 1, 2, 3, and 4. (3) Assuming the communication port setting being 19.2k, 8, odd, 1 (baud rate, data bits, parity, stop bit). a. How many characters can be transmitted per second? b. If the DCE is a temperature device which provides temperature reading with format being xxx.xx (6 characters), what is the upper limit of the temperature sampling rate imposed by the port setting above