A food processing company wants to ensure that the taste of its very popular fro-zen low-fat dinner entre meets the Six Sigma quality standards. The manufacturing engineers believe that the taste is strongly related to the porcontage of a secret spice (known as Alpha-Omega 1001) that is added during the production process. A number of consumer taste tests were conducted, and it was found that all samples of entres that were rated "excellent" contained between 1.5 and 3.25 percent Alpha-Omega 1001. If the mean percentage of Alpha-Omega 1001 falls in the middle of the identified limit, calculate the standard deviation necessary to achieve Six Sigma quality. Upper tolerance limit =3.25 Lower tolerance limit =1.1 Upper tolerance limit =3.25 Lower tolerance limit =1.5 Upper tolerance limit =3.20 Lower tolerance limit =1.5 Upper tolerance limit =3.25 Lower tolerance limit =1.7