1)Write a member function named addDrug which accepts 3 parameters name, price, and quantity of a drug, then add it to the list 2) Write a member function named getDrug which accepts an integer parameter that represents the index (location) of the drug then returns name and quantity of this drug from the specific location. (Remember: You should check the location if it is in the list range or not. Otherwise, print "Out of range"). 3) Write a member function named printAllHigher will accept a double parameter represents a price then, prints all drugs name which prices are higher than the parameter.