Help with part b questions asap

(i) Explain the difference and significance (if any) for the curves (x) and (y). (ii) Describe the characteristics of the curve in regions A,B, and C. (iii) A sample containing a mixture of CaCO3 and CaO was analyzed using the TGA technique. A change in mass occurred in the region 500900C from 145mg to 115.4mg. What percentage of CaCO3 was in the sample? (c) The decomposition of calcium oxalate (CaC2O4H2O) has three distinct steps shown in the table below with corresponding mass losses. Use the data on the table to draw (same diagram) TG and DTG analysis curves for the decomposition of calcium oxalate. (i) Explain the difference and significance (if any) for the curves (x) and (y). (ii) Describe the characteristics of the curve in regions A,B, and C. (iii) A sample containing a mixture of CaCO3 and CaO was analyzed using the TGA technique. A change in mass occurred in the region 500900C from 145mg to 115.4mg. What percentage of CaCO3 was in the sample? (c) The decomposition of calcium oxalate (CaC2O4H2O) has three distinct steps shown in the table below with corresponding mass losses. Use the data on the table to draw (same diagram) TG and DTG analysis curves for the decomposition of calcium oxalate