It has been found that when sodium benzoate and ascorbic acid are present in a beverage a reaction can occur that produces benzene which is a reported carcinogen. WHO has set a limit for benzene in drinking water of 10.0ng/ml (ppb). Several beverages were monitored for benzene by a GC-MS method. The sample preparation involved passing 100.00ml of the beverage through a C-18 SEP. The benzene was eluted from the SPE using 2ml of dichloromethane and analyzed. The following data was obtained: Standard Signal 500ng/ml 8979 250ng/ml 4522 100ng/ml 1811 50ng/ml 883 Sample Beverage A Beverage B 7948 2001 Beverage C 1973 Beverage D 5329 Calculate the concentration of benzene in the beverages. Do any exceed the allowed level. Assume a density of 1 for all samples