I need help with solving this problem.

The following applies to this question and the next three: As we discussed in class to maintain the physiological balance of fluids in the body, the glomerular filtration rate (GFR) is an important indicator of kidney function. For this problem assume that 20% of cardiac output, Qoo = 5 L/min, enters the kidneys. Remember that: GFR = Kf (Pc - PB - IIc + IIB) Normal values are: Kf ~ 12.5 mL min.mm Hg Pc = 60 mm Hg PB = 18 mm Hg (IIc) = 32 mm Hg IIB = 0 When a person has kidney stones, the urinary tract is obstructed, thus raising the hydrostatic pressure in the tubules. Let's assume the hydrostatic pressure in the tubules is raised by 25%, what is the new GIR? Here enter it as a fraction of the original GFR