an external tensile force of 8,000 lbf is first applied to a linear spring wire with an original length of 4.00 in, a cross sectional area of 1 in2, and a spring constant of 400,000 lbf/in. after 30 minutes the external load is then gradually reduced to 4,000 lbf and held constantly at this level for another 30 minutes before the load is completely removed. the elastic limit of this spring is 200,000 psi. rank the total length of the spring wire during this process from the longest at the top to the shortest at the bottom.