$1.$Retrieve the names of patients who have consulted doctors in the $$Neurology$$ department

OR location at $$Selangor$.$

$2.$Retrieve the names of patients who have consulted doctors more than once in the month

of April $2024.$

$3.$ Retrieve the names of patients who have not consulted any doctor yet.

$4.$ Retrieve the names of patients who have consulted doctors in $$Pediatrics$.$

$($Note: use a nested subquery and each subquery included the IN functions$)$

do not use join