Cant Figure out what to do Keeps saying make sure your adding an instance Method called getFullName().

struct Person {
    let firstName: String
    let lastName: String

    // 1. You don't need the parameters here, as we are using
    //    the firstName and lastName of this very struct
    // 2. The function is supposed to return a String, but you have
    //    not defined a return type, so it won't return anything.
    //    You specify the return type via -> Type after the parameter
    //    definition. See code below.
    func getFullName(firstName: String, lastName: String) {

        // It's not necessary to concatenate Strings here, though possible.
        // As you are already using string interpolation, let's merge it to
        // one String. See code below.
        let fullPersonName: String = "\(firstName) " + "\(lastName)"

        // Now you have to return fullPersonName, this is returning
        // "nothing" and the compiler would not let you as there is
        // no return type specified for this function, as mentioned before
        return 
    }
}

// 1. Why create a Person object that has empty names.
//    Specify the names right here
// 2. The assignment asks you to create a constant called aPerson,
//    not newPerson. It is vital to stick to the assignment description,
//    otherwise you won't pass the challenge even if your code works
let newPerson = Person(firstName: "", lastName: "")

// As you have not defined a return type before, you can't assign
// a return value, so this method does nothing, basically.
// Moreover, as mentioned before, there's no need for passing
// the names here, as you can use the ones you initialized the
// struct with
newPerson.getFullName("Richard ", lastName: "Parkins")

struct Person {
    let firstName: String
    let lastName: String

    // No parameters, returns a String
    func getFullName() -> String {
        // You can also return the string right away
        return "\(firstName) \(lastName)" 
    }
}

// Let's use the struct to create an instance of Person and assign it to a constant named aPerson
let aPerson = Person(firstName: "Richard", lastName: "Parkins")

// Once you have a Person instance, call the instance method and assign the full name to a constant named fullName.
let fullName  = aPerson.getFullName() // Richard Parkins