HiTech is a company that specializes in IT training. The Company has $30$ instructors and can handle up to $100$ trainees per training session, each instructor has ID$,$ name $($FName$,$ LName$),$ DOB, email, $1.\mathrm{.}3$ TelNo. The instructors could be part$-$time or full$-$time. Full$-$time instructors have the following attributes: specialization, salary, rank, vocation$-$days. Part$-$time instructors have the following attributes: pay$-$Hourly$-$Rate, worked$\_$hours. The Company offers many advanced technology courses, each taught by a teaching team of two or more instructors. Each instructor is assigned to a maximum of two teaching teams or may be assigned to do research. Each trainee undertakes one advanced technology course per training session, we have four sessions per year, and eac