Determine the 25 year peak runoff rate for a 10 acre area that is developed for attached multi unit residency. TxDOT has the maximum runoff coefficient for this type of development as 0.75. The 25 year storm intensity is 0.5ft/hr.

a 4.1 cfs
b 3.75 cfs
c 45.0 cfs
d 49.5 cfs