In 2014, a major chemical leak at a facility in West Virginia released 7500 gallons of MCHM (4-methylcyclohexylmethanol, C₈H₁₆O) into the Elk River. The density of MCHM is 0.9074 g/mL. 

(a) Calculate the initial molarity of MCHM in the river, assuming that the first part of the river is 7.00 feet deep, 100.0 yards wide, and 100.0 yards long. 1 gallon = 3.785 L. 

(b) How much farther down the river would the spill have to spread in order to achieve a “safe” MCHM concentration of 1.00 x 10^-4 M? Assume the depth and width of the river are constant and the concentration of MCHM is uniform along the length of the spill.