Function

Write a function called 'best' that take two arguments: the 2-character abbreviated name of a state and an outcome name. The function reads the outcome-of-care-measures.csv file and returns a character vector with the name of the hospital that has the best (i.e. lowest) 30-day mortality for the specified outcome
in that state. The hospital name is the name provided in the Hospital.Name variable. The outcomes can be one of “heart attack”, “heart failure”, or “pneumonia”. Hospitals that do not have data on a particular outcome should be excluded from the set of hospitals when deciding the rankings. If there is a tie for the best hospital for a given outcome, then the hospital names should be sorted in alphabetical order and the first hospital in that set should be chosen. The function should check the validity of its arguments. If an invalid state value is passed to 'best', the function should throw an error via the stop function with the exact message “invalid state”. If an invalid outcome value is passed to 'best', the function should throw an error via the stop function with the exact message “invalid outcome”.