4. [2 pts] Consider the ER schema for the MOVIES database as follows: Assume that MOVIES is a populated database. ACTOR is used as a generic term and includes actresses. Given the constraints shown in the ER schema, respond to the following statements with True, False, or Maybe. Assign a response of Maybe to statements that, although not explicitly shown to be True, cannot be proven False based on the schema as shown. Justify each answer. a) There are some actors who have acted in more than ten movies. b) Some actors have done a lead role in multiple movies. c) A movie can have a minimum of two lead actors. d) Every director has been an actor in some movie