Question $2$

Design exam module that takes dipswitch values, whenever we push pushbutton $1,$ adds it to

total and whenever we push pushbutton $2,$ subtracts it from total. The result is shown on

seven segment display unit.

Assume sevensegment module is defined, you will just instantiate it in module exam.

$//$This part is ready to use, just use it in "Module exam"

endmodule