$1.[15$ points.$]$ Make a millisecond$-$accurate timer that starts at $0\mathrm{.}000,$ counts up to $9\mathrm{.}999$ seconds, and then resets back to $0\mathrm{.}000.$

To do this, you should divide the $100$ MHz clock signal to provide a $1$ KHz clock $($a clock with a period of $1$ ms $).$ This clock should be used to increment a $4-$digit decimal counter. For instance, you can have each digit be represented as a $4-$bit binary number, that resets to $0$ when it gets to $10,$ and increments the next digit.

You should display the count on the right$-$most four hex displays, as a decimal number. You may modify your solution from Lab $10$ to control the hex displays.

Name code as q$1.$txt$.$

$2.[10$ points.$]$ Using your timer from Part $1,$ add functionality to your timer to let you reset and start$/$stop it:

$($a$)$ When you press the BTNO button, your timer should reset back to $0\mathrm{.}000.$

$($b$)$ When you press the BTN$1$ button, your timer should start or stop. If the timer is currently stopped, pressing this button should start it$.$ If it is currently running, pressing this button should stop it$.$