A porous medium has a permeability of 4x10^-9 Darcys. Cross-section is 60x60 ft² and length is 200 ft. The pressure across the porous medium is 2400 psi. Calculate the flow rate in B/D, if the fluid viscosity is 8 cp. by creating a fracture along its length, so that the flow rate increases to 6 B/D. What will the permeability of the fracture have to be to achieve that rate? Permeability is given by (w²/12)x1.01325x10¹² Darcys, where w is in meters.