Update user-manual/student/img/image74.png, user-manual/student/img/image73.png, user-manual/student/img/image70.png, user-manual/student/img/image69.png, user-manual/student/img/image71.png, user-manual/student/img/image72.png files
Deleted image69.png, image70.png, image71.png, image72.png, image73.png, image74.png files