Jean is 75 years old and has recently moved in with her daughter. Jean’s husband died when she was 55 and she has been on her own ever since. Jean is noticing now that when she goes to get something in another room she often forgets what she was going to get and has to return to the original room to remember. When she wakes up at night she often forgets the way to the bathroom in this new home. Jean sometimes calls her grandchildren by the wrong name. Jean is probably suffering from: (p. 626)