Swift code

I need code (Swift 3) for the following two buttons:

@IBAction func dividePressed(_ sender: AnyObject)

@IBAction func addPressed(_ sender: AnyObject)

The code needs to have:

·  Public variables of the type float called numerator, denominator and total.

·  A method called 'Add' that returns the sum of numerator and denominator and sets the total variable.

·  A method called 'Divide that returns the division of the numerator and denominator and sets the total. The 'Divide' method should contains a 'try/catch' to ensure that dividing by zero is addressed.

· Use the add and divide method in the class to return results when the buttons are clicked