(ix) In the context of explaining the difference between the logical AND operator(&&) and the bitwise AND operator(&) say what value portb will end up with in each of the following cases, if the initial value of portb is 0x55:- a) portb = portb & 0x0F; b) portb = portb && 0x0F; (x) Draw schematic diagrams to show:- a) How an LED is connected to a pin of PORTB b) How a switch is connected to a pin of PORTB (xi) Write the main function for a simple C program that tests a LED connected to pin 0 of portb. (xii) Write the main function for a simple C program that tests a push button switch connected to pin 0 of porta. Can assume a LED is connected to pin 0 of portb. (xiii) Draw the flowchart to represent the following snippet of some C firmware, where count is a variable; if ( count > 20) { count = 0; portb = 0xAA; } else { count ++; portb = 0x55; } delay_ms(100);