Each ATmega128 USART module has two flags used to indicate its currenttransmitterstate: the Data Register Empty (UDRE) flag and TransmitComplete (TXC) flag. What is the difference between these two flags, andwhich one always gets set first as the transmitter runs? You will probablyneed to read about theData Transmissionprocess in the datasheet (includ-ing looking at any relevant USART diagrams) to answer this question