solve for doctor well testing

3. Following completion, a 18 well is produced for some time, believed to be in transient behavior, before shut in for a lengthy build up test. The production history is summarised below: Np=qt 24hr If the fluid and reservoir properties are summarised as ionows. k=65md,h=50f,=0.22,=0.85cp,0=1.35rb/stb,Ct=35.0E06psi1, and pi=3500psi. I. Calculate the minimum drainage radius. II. Calculate the wellbore pressure at the end of the seventh day using Horner's approximation if applicable or any other method if it doesn't