Serum in use from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 241 units was acquired for the intensity of the 671 nm red emission line. Then 1.00mL of an 11.4 mM Lithium standard was added to 9.00 mL of serum, as well as this spiked serum gave an intensity reading of 718 units. Explain what is the original concentration of Li in the serum?