Using the viscoelastic model shown below: a) Sketch the strain response for the viscoelastic model shown below to a constant load over a period of time. Include in the sketch the strain response after removing the load. b) Calculate the amount of instantaneous elongation (if any) in terms of the applied stress and the shown element properties. c) Calculate the amount of non-recoverable strain (if any) in terms of the applied stress, the shown element properties, and time of loading. Recall: For spring elements: 0 =E& For dashpot elements de/dt = o EL nu E2 W