Wrong access method. the variable name isn't defined, only this.name is defined. So it's looking for a variable in the function scope called name instead of a property of the object called name.

To access an object's property from within the object we use the this keyword. Thus we'll need to use this.name to access the name property in the implementation below.

Person.prototype.greet = function(otherName){

     return Hi + otherName + , my name is  + this.name;

}