Suppose that a system has 5000 objects and 100 domains at some time. 1% of the objects are accessible (some combination of r, w and x) in all domains, 10% are accessible in two domains, and the remaining 89% are accessible in only one domain. suppose one unit of space is required to store an access right (some combination of r, w, x), object id, or a domain id. how much space is needed to store the full protection matrix, protection matrix as acl, and protection matrix as capability list