A fireman is soaking a home that is close to a burning building. To prevent water damage to the neighboring home, he throttles down the flow rate so it will not break windows. Assuming a window can withstand up to 25 lbf what is largest volumetric flow rate he should allow (gal/min)? Firehose D1=8in d2=4in diameters. when water hits window water deflected 90 degrees.