A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee must answer 5 of the multiple-choice questions and 4 of the open-ended problems, in how many ways can the questions and problems be chosen?
◦ 261,273,600
◦ 1890
◦ 5,443,200
◦ 1080