$1.$ Find the number of patients in the medical record table, then count and total their number of visits and consultation fees more than RM $2000\mathrm{.}00.$

$2.$ List patients who have been consulted by doctors working in the department location at $\text{'}123,$ New Street, Kuala Lumpur.$\text{'}$

$3.$ List patients who have been consulted by doctors with IDs D$101,$ D$104$ and D$106.$

$($Note: use a subquery and the IN function$)$

$4.$ Retrieve the names of patients who have consulted doctors more than once.

$($Note: use a subquery, IN$,$ group, having and count function$)$