Answer, explain, and analyze in detail in more than 10 lengthy sentences. Ensure that you cite outside sources correctly and link the sources at the bottom of your answers. Answer intelligently and make sure your answer is factual, direct, and correct:

2) Let us assume the price that you derived under 1c) was a bit high, and thus people will look for alternatives. Martin Smodis and his colleagues at the University of Maribor in Slovenia measured that discarded cell phones each contain 0.082 gram of a rare- Earth elements. How low would the price of old cells phone need to drop to become competitive with your prices 1a) and 1c) ? Show your calculations for 1) and 2). Compare both prices with the current price of your element X.

My element: Cerium Cost on the Moon: $25.8 billion USD 382 kg of lunar material was brought back to Earth by the Apollo Program. Element of Cerium has a 0.0046% on Earth Problem 1a) 5.4-5.5 USD / kg, and if multiplied by 100, 540-550 USD / kg Problem 1c) $453,357,600 USD / kg