Q$8)$ based on an experiment it is determined that the average linear flow velocity of an aqifier is $1\frac{m}{?}$ day when the hydraulic gradient is $0\mathrm{.}0004.$ a sample of the aquifier is tested and found to have a porosity of $15\%.$ Estimate the hydraulic conductivity of this aquifier

a$)400\frac{m}{?}$ day

b$)0\mathrm{.}0027\frac{m}{?}$ day

c$)375\frac{m}{d}ay$

d$)0\mathrm{.}00006\frac{m}{?}$ day