A rectangular block of rubber with dimensions W $=1\mathrm{.}6$ in$.$ and H $=3\mathrm{.}2$ in$.$ is distorted by moving the right side down d $=0\mathrm{.}5$ in$.$ Determine the resulting average normal strain along diagonal AB$.$ Enter the average normal strain along diagonal AB in in$./$in$.$ to the nearest $0\mathrm{.}001$ in$./$in$.$