Write a function that determines whether or not someone can vote. The only argument is an object that represents the person. That object has a property age that is a number which represents the person's age in years and a property isCitizen that is true if they are a citizen and false if they are not. The function should return true only if the person is a citizen and is $18$ years or older. Otherwise, it should return false. $($JavaScript$)$

Examples:

canVote$(\{$age: $20,$ isCitizen: true$\})$; $//$ returns true

canVote$(\{$age: $16,$ isCitizen: true$\})$; $//$ returns false

canVote$(\{$isCitizen: false, age: $30\})$; $//$ returns false

canVote$(\{$age: $7,$ isCitizen: false$\})$; $//$ returns false