I need help with this, no idea where to start

Danny, the owner of a medical supply company, has conducted business with a Japanese supplier, Osaka Supplies, for sanitary products including face masks for years since December 2010. One of the contracts between them was to transport 500 boxes each month from Japan to Hong Kong. Payment for the goods was to be made in advance before the shipment each month. In 2020, with the outbreak of Covid-19 pandemic, many countries which had been in short supply of face masks banned exports of masks in order to match the huge demand for the masks needed by health workers and their citizens. With the aim of controlling the distribution of face masks within the country for facing the coronavirus pandemic, the Government of Japan banned all the export of face masks commencing from March 2020. Required: In the context of law of contract, advise Danny of his legal rights under the following two different situations. (a) In early March 2020, due to the export ban of face masks, Osaka Supplies informed Danny that no face masks could be transported to Hong Kong from March 2020 onwards. The payment for March transaction made by Danny will be returned via bank remittance. The supply contract for face masks would therefore be discharged. With the excessive demand for face masks under the pandemic in Hong Kong, the price of face masks was increased dramatically since February 2020. Therefore, Danny insisted that Osaka Supplies must perform its obligation under the contract for shipping the face masks to Hong Kong. Otherwise, he would sue Osaka Supplies for breach of contract and recover the damages suffered due to the breach.Criteria Weighting Identification of legal issues 5% Explanation of relevant legal principles and rules 30% Application of the rules to the problem 30% Conclusion and/or recommendation 15% Research on relevant cases 10% Organization and presentation 10% Total 100%