$[10$ point$]$ Transmissivity indicates the rate at which water is transmitted through a unit width of a confined aquifer under a unit hydraulic gradient. The following drawdown data shown in the Table are from an observation well located $475ft$ from a pumping well that fully penetrates a confined aquifer. A discharge of $1\mathrm{.}17f\frac{t^3}{s}$ is pumped from the well. The drawdown data are plotted on a semilog paper and a straight line is drawn through the data $($shown below$).$ Estimate the transmissivity $(f\frac{t^2}{s})$ of the aquifer.

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