A mass of 2.5 kg is suspended from the end of aspring; the other end of the spring is attached to the ceiling. Theequilibrium length of the spring (with no mass attached) is 1.0 m.The length with the mass attached is 1.136 m. (a) Calculate Hooke's contant k for this spring. (b) Now suppose the first mass is replaced by a second mass of 6.7 kg.Calculate the length of the spring in this case.