The microcontroller has to read an external signal, that uses port pins RA$1$ and RAO. RAO is used as a clock, and it is driven by an approximately $50$kHz clock signal. The RA$1$ input is used as serial data input, where the data bits can be sampled on the rising edge $(0$ to $1$ transition$)$ of the clock signal. The serial input data consists of $16$ bit unsigned numbers, and the most significant bit comes first. Write a subroutine $($INIT$\_$ PORT$),$ that sets the used port pins $($RAO$,$RA$1,$RBO,RB$1)$ to the appropriate mode $($input or output$).$ The subroutine must not change any other port pin. Write the assembly subroutine $($READ$\_$DATA$),$ that: First sets port pins RBO and RB$1$ to $0,$ then waits for an incoming data on RAO and RA$1,$ and after the $16$ bit value arrives, sets RBO and RB$1$ according to the incoming value: RBO,RB$1=0,1-$ if value $>40000,*$ RBO, RB$1=1,1-$ if value $=40000,$ RBO, RB$1=1,0-$ if value $<40000.$