PIC Microcontroller 16F84A Question. I would like to verify my answers. Could someone kindly solve these questions please? Thanks.

Write a short PIC16F84A assembly language program to achieve each of the following tasks. You can use symbolic names for bits and registers where appropriate (i) Subtract the value in File 0x40 from the value in File 0x41 and store the result in the working register. If the result is negative, set the value in the working register to zero. (ii) Clear the least significant four bits in File 0x25 leaving the remaining (ii) Convert the tens value stored in File 0x31 and the units value stored in (iv) Clear the watchdog timer. bits unchanged. File 0x32 to a packed BCD value and store this in File 0x33. Configure the interrupt system so that the interrupt service routine is called whenever there is a change on any of the eight Port B pins. (v) Write a short PIC16F84A assembly language program to achieve each of the following tasks. You can use symbolic names for bits and registers where appropriate (i) Subtract the value in File 0x40 from the value in File 0x41 and store the result in the working register. If the result is negative, set the value in the working register to zero. (ii) Clear the least significant four bits in File 0x25 leaving the remaining (ii) Convert the tens value stored in File 0x31 and the units value stored in (iv) Clear the watchdog timer. bits unchanged. File 0x32 to a packed BCD value and store this in File 0x33. Configure the interrupt system so that the interrupt service routine is called whenever there is a change on any of the eight Port B pins. (v)