i need help in these question plz help i dont understand them

contract between Kwik Import Company in Los Angeles and Macro Retail Corporation in New York does not expressly state which party bears the risk of loss but says only that Kwik is "to ship goods at the seller's expense."At what point does the risk of loss of the goods pass from the seller to the buyer? Explain the rule(s) that apply.

Ann boards her horse Blaze at Cora's Ranch.Ann sells the horse to Dam and tells Cora, "I sold Blaze to Dan."Cora says, "Okay."That night, Blaze is kicked in the head by another horse and dies.Who suffers the loss? Explain the rule(s) that apply