Update user-manual/student/img/image77.png, user-manual/student/img/image83.png, user-manual/student/img/image70.png, user-manual/student/img/image78.png, user-manual/student/img/image81.png, user-manual/student/img/image74.png, user-manual/student/img/image73.png, user-manual/student/img/image71.png, user-manual/student/img/image75.png, user-manual/student/img/image69.png, user-manual/student/img/image65.png, user-manual/student/img/image64.png, user-manual/student/img/image63.png files