Standard Addition Graph: Tooth enamel consists mainly of themineral calcium hydroxyapatite. Trace element in teeth ofarchaeological specimens provide anthropologists with cules aboutdiet and disease of ancient people. Students at HamlineUniversity measure strontium in enamel from extracted wisdom teethby AAS. Solutions with a constant total volume of 10.0 mLcontained .750 mg of dissolved tooth enamel plus variableconcentrations of added Sr. A.) Find the concentration of Sr and its uncertainty in the 10-mL sample solution in parts per billion ng/mL. (b) Find the concentration of Sr in tooth enamel in parts per million g/g