Which of the following statements is true with regard to the flexibility method of analysis.

Flexibility of a structure may be defined as the displacement caused by ----------------- force and stiffness of a structure may be defined as the force required for ----------------- displacement

In flexibility method the unknown quantities are ----------------- whereas in stiffness method the unknown quantities are --------------

The ratio of the stiffness of a beam at the near end when the far end is hinged to the stiffness of the beam at the near end when the far end is fixed is