Write simple Z specifications that describe some of the top-level operations of a bank autoteller machine, including the operations: (a) RequestBalance to enquire about the user’s current bank balance...

Write simple Z specifications that describe some of the top-level operations of a bank autoteller machine, including the operations: (a) RequestBalance to enquire about the user’s current bank balance (b) WithdrawCash to make a cash withdrawal from the machine (note that the conditions for this to succeed are that the amount to be withdrawn is within the user’s daily limit, is available in their account, and is also available as cash from the hoppers in the machine)