How long does the asynchronous transmission of a 150 KByte (1 KByte = 1024 bytes) file take via a serial null modem cable with a transmission speed of U baud (U bit/sec)? Here, no parity, one start...

How long does the asynchronous transmission of a 150 KByte (1 KByte = 1024 bytes) file take via a serial null modem cable with a transmission speed of U baud (U bit/sec)? Here, no parity, one start bit, 2 stop bits and eight data bits are to be used. Explain your answer or give the calculation method and determine the transmission time for U = 19,200 baud.