material since ...I want the solution without explanation, just numbers

Q2: [5 marks] Sometimes it is desirable to determine the weight percent of one element, C1,that will produce a specified concentration in terms of the number of atoms per cubic centimeter, N1, for an alloy composed of two types of atoms. This computation is possible using the following expression: where NA is Avogadro's number, 1 and 2 are the densities of the two elements, and A1 is the atomic weight of element 1. Derive Equation 4.22 using Equation 4.2 and expressions contained in Section 4.4