Write a C program for an MCS $8051/2$ microcontroller that will enable External Interrupt $0,$ Timer $1$ interrupt,

and the Serial Communication interrupt. The external interrupt must occur on the falling edge. In the main

program port P$1$ must display $0$XDE if no interrupt occurs. If the digital value on P$3\_2$ changes from high to low

$($falling edge$)$ then the interrupt routine $($handler$)$ you must do the following: Display $0$xEC for as long as the value

on P$3\_2$ is low. While still in the interrupt routine, if the value on P$3\_2$ go high again you must display $0$x$09$ for

$2$ seconds and then return to the main program. The display should thus again indicate $0$xDE. If Timer $1$ rolls over, then you must invert the output level of P$3\mathrm{.}4.$ If the serial communication interrupts, then: If a value is received, you must load the value into a register called $$Received$.($This is done by Received $=$ SBUF$).$ If a value has been transmitted successfully, then P$3\mathrm{.}5$ must be switched on for $200$ms and then switch off again.