I need help with this please

Rihanna, well known singer and owner of the Fenty brand of lingerie entered into a written and signed contract to perform at Madison Square Garden on January 11, 2020 and January 12. 2020 for a total payment of $1.5 million dollars. By November 1, 2019 Madison Square Garden has had advanced ticket sales of $2 million dollars. (a) On January 10, Rihanna is diagnosed with laryngitis and is not able to sing. She cannot perform at Madison Square Garden on January 11th and 12th. Madison Square Garden sues Rihanna for breach of contract. Who wins? Explain. (b) Instead of the facts in (a), assume that on January 8. Rihanna tells Madison Square Garden that she will not be performing at Madison Square Garden but will instead perform a charity event in her home country of Barbados. Explain separately whether Madison Square Garden will be able to: (i) obtain an order of specific performance that requires Rihanna to perform at Madison Square Garden on January 11th and 12th. (ii) obtain an injunction that prevents Rihanna from performing at the charity event in Barbados on January 11th and 12th