Suppose, switch S1 is connected to P1.1 and switch S2 is connected to P1.2. When S1 on and S2 off, an LED is switched on. If S1 off and S2 on, your intake and roll will be displayed in an LCD. And in both cases, a 7 segment display will show the value of switch that is on(7 segment will show 1 if S1 is on, 2 if S2 is on; and 0 if both switch are off) Implement this design using 8051 in proteus and code in keil.