Extra question for those who need it$.$ Just complete the following figure; $($i$)$ need to show the types defects for each corresponding curve; $($ii$)$ write down the neutrality condition; $($iii$)$ derive important defect reactions and derive required slopes based on the defect concentration equations for low $p{O}_2,$ stoichiometric $($intermediate$)p{O}_2,$ and high $p{O}_2$ regions.