On October 1,Mary Miller,a World-Renowned Entertainer,entered into a Contract with Quality

On October 1,Mary Miller,a world-renowned entertainer,entered into a contract with Quality Production Ltd.to perform a concert in Sudbury,Ontario,on December 15.On October 15,Quality signed a contract to rent the Centennial Hall from its owners,Business Buildings Ltd.,for the evening of December 15.Business Bldg.was advised of the purpose for which Quality was renting the hall,and Quality paid Business Bldg.a deposit of $5000.Quality had tickets printed,advertised the concert,hired a band,and paid Mary Miller a $7500 advance.Expenses by December 10 totalled $12 500 excluding the advance to Mary Miller.
a.If on December 10,the Centennial Hall burned to the ground through no fault of Business Bldg.,would Quality be able to sue Business Bldg.for its losses,and if so,what would Quality likely recover? Explain any legal principles and defences the parties may rely upon.
b.If on December 10,the above (a)did not happen but Mary Miller died,could Quality successfully sue Mary Miller's estate for damages,and if so,what would Quality likely recover? What legal principles and defences would be available to the parties?