Both Macbeth and Lady Macbeth become victims of their guilt, and it manifests itself in hallucinations. Macbeth sees the ghost of Banquo everywhere, whereas Lady Macbeth sees blood on her hands.
The cow would be consuming 80 gallons of water during a hot day. If on any day the cow drinks 40 gallons on a hot day it drinks double the amount so you multiply them by 2 and its 80. I hope this answer can help you.
