explain two in depth paragraphs why option 2 of the UNCITRAL Model Law on International Commercial Arbitration article 7 is not better than option 1, "option 2 provides as follows: "Arbitration agreement" is an agreement by the parties to submit to arbitration all or certain disputes which have arisen or which may arise between them in respect of a defined legal relationship, whether contractual or not." make sure to include case law in the explanation and reference it