You are using a tunable energy source (the energy can be varied from 7000 - 9000 eV) to detect Ni K₁ and the Co K₁ signals from a Ni-Co compound (labeled sample). You place an energy sensitive fluorescence detector (the energy resolution of the detector is 100 eV) placed at 90⁰ with respect to the photon source. Describe an experiment in about 100 words to measure the composition of the Ni-Co compound and the chemical states of Ni and Co.