V Read the case below and then answer questions (25 points). Under a documentary negotiation credit, the credit states: [1] Commercial invoices in triplicate should be provided; [2] Insurance covered by the seller; [3] Transportation started from Ningbo, China to Hamburger, Germany not later than July 18th,2022. [4] The transaction is subject to UCP600. Please answer the following questions: [1] Who is responsible to pay the insurance premium? [2] What should be written on a commercial invoice to make it function. [3] If the seller finds it is hard to make a complying presentation and wants to make amendment of the credit, what should he do? Please tell the main procedures. [4] If the cover note is presented for negotiation, will the negotiating bank accept it or not? Give the reasons for your judgment. [5] If it shows "one carton short" on the B/L, will the negotiating bank accept it or not? Give the reasons for your judgment