2: Modify the Sign0 class to take in an optional parameter of type list that has 3 sentences that can be displayed on the screen. If there aren't three items in the list, then the default message as shown in problem I will be displayed. Example usage: >>lines-'line 1, 1ine 2 line 3 >>> Sign (lines).mainloop ) ine 2 >>Sign().mainloop) GREAT DEAL Android 1.0 Phones for $10 >Ist > Ist.append( The key to the lab is to add multiple labels" >>Ist.append("This list will be stored in an instance variable" >>>Ist.append( The text property of the labels will be set to each of these message") >>Sign/(Ist).mainloop) / Digital Sign The key to the lab is to add multiple labels This list will be stored in an instsance variable