var wizard = {
    schoolName: 'Hogwarts',
    headMaster: 'Professor Dumbeldore ',
    getWizardName: function(firstname, lastname) {
        var fullname = firstname + ' ' + lastname;
        return fullname;
    },
    getSchoolNameAndHeadMaster: function(){
    	return this.headMaster + " will be your headMaster at "+ this.schoolName
    }

};

var diagonAlly = function(favoriteSpell, wizardingHouse, firstname, lastname) {
    console.log(this.getWizardName(firstname, lastname) + ' Welcome to Hogwarts!!!');
    console.log(this.getWizardName(firstname, lastname) + '\'s favorite spell is ' + favoriteSpell + ' and is sorted to ' + wizardingHouse + ' house');
    console.log(this.getSchoolNameAndHeadMaster())
};

var welcomeWizard = diagonAlly.bind(wizard);

welcomeWizard('Expecto Petronum','Griffindor', 'Harry', 'Potter');
welcomeWizard('Wingardum Leviosa','Griffindor', 'Hermoine', 'Graneger');
welcomeWizard('Crucify','Slytherin', 'Draco', 'Malfoy');