Problem 2 code #define F_CPU 16000000UL #include #include void main(void) { char ch UCSRA=0x00; UCSRB=0x58; UBRRH=0x00; UBRRL=0x0F; DDRB = 0xFF; seio; while (1) { if (UCSRA & 0x80) { ch = UDR; switch (ch) { case 'a': PORTB = PORTBOx10; break; case 'b': PORTB = PORTB^0x20; break; default: PORTB = PORTB0x40; 1. 2. 3. 4. What baud rate the program sets for serial communication? How many seconds it takes to send or receive one full byte? Show calculations. [10 points) Explain what is the purpose of lines UCSRA=0x00; and UCSRB=0x58; in the code? [5 points) Which pin of PORTB toggles if the program receives character "Z"? [5 points] The program uses polling method to receive data serially, re-write the code for interrupt-based receiving of data. Use Receive Complete Interrupt. [15 points)