what is the write code to add event handler to button in this code ? Click Me! var button = document.getElementsByTagName("button"); button.onclick= function () { alert("Click fired!"); } var button = document.getElementsByTagName("button")[0]; button onclick= function() { alert("Click fired!"); } var button = document.getElementsByTagName("button")[0]; var assignAlert() { return function () { alert("Click fired!"); } } button onclick= assignAlert() var button = document.getElementsByTagName("button")[0]; var makeAlert() { alert("Click fired!"); } button onclick=makeAlert; QUESTION 4 Properties to create space around each side of elements ? Omargin-top padding-top O padding-bottom Omargin-bottom 5 points Save Answer QUESTION 11 What property on the event object contains the DOM object that invoked the element ? O event.element O event.source O event.target O event.invoker 5 points Saved