Problem 2 code #define F_CPU 60OUL include aviob Hinclude interrupt.h void main(void) charch UCSRA-000 UCSRB-0258 UBRRH-Ox00 UBRRL-OXOF DOROFF si): while (1) if (UCSRA & 0x80) ch - UDR: switch (ch case PORTB-PORTBO:10: break; default PORT PORTR20 break; PORTB = PORTB0x40 ? 1. What bred rate the program sets for serial communication? How many seconds it takes to send or receive one full byte? Show calculations [10 points) 2. Explain what is the purpose of lines UCSRA=x00, and UCSRBOXS, in the code? 5 points] 3. Which pin of PORTB Toggles if the program rectives character Z? 15 points) 4. The program uses polling method to receive data serially, re-write the code for interrupt-based receiving of data. Lise Receive Complete Interrupt. 115 points)