Q$2.$ Design a "turnstile" application using Timer $1$ to determine when the $10,000$ th per son has entered a fairground. Assume $($a$)$ a turnstile sensor connects to $TI$ and generates a pulse each time the turnstile is rotated, and $($b$)$ a light is connected to $P1\mathrm{.}7$ that is on when $P1\mathrm{.}7=1,$ and off otherwise. Count "events" at T$1$ and turn on the light at P$1\mathrm{.}7$ when the $10,000$th person enters the fairground. $($See Figure $4-11.)$ use $8051$ with crystal $12Mhz$