Q2/ A / Explain the basic differences between the following ( Answer five only) 1- Interrupt vs. Polling 2- Timer vs. Counter 3- 8 Mhz vs. 16 Mhz crystal oscillator 4- JMP vs. RJMP instruction 5-RXEN vs. TXEN serial flag bit 6- Half vs. Full duplex 10 Marks B/ Describe with drawing the architecture of Harvard and von Neumann microcomputer system and which one of them is more suitable and is used for microcontroller system