Question $2$: Fractional Flow $(50$ points$)$

The linear system with the below data is under consideration for a waterflood project with a water injection rate of $1000.bb\frac{l}{d}ay.$ The oil viscosity is considered constant at $1\mathrm{.}0cp.$ Calculate and plot the fractional flow curve for the reservoir dip angle of $10,$ assuming $($a$)$ updip displacement and $($b$)$ downdip displacement.