Consider two massless springs connected in series. spring 1 has a spring constant k1, and spring 2 has a spring constant k2. a constant force of magnitude f is being applied to the right. when the two springs are connected in this way, they form a system equivalent to a single spring of spring constant k. part awhat is the effective spring constant k of the two-spring system? express the effective spring constant in terms of k1 and k2.part bnow consider three springs set up in series as shown. (figure 2) the spring constants are k1, k2, and k3, and the force acting to the right again has magnitude f. find the spring constant k′ of the three-spring system. express your answer in terms of k1, k2, and k3.