Location of $SDH$ (Succinate dehydrogenase) enzyme of the Krebs cycle in plants is

The reaction which is catalysed by a protein that is not found in the matrix of mitochondria is

In which of the following parts of the mitochondria is the succinic dehydrogenase enzyme located?

Do you know any step in the $TCA$ cycle where there is substrate-level phosphorylation? Which one?

Kreb's cycle is completed with the formation of

All enzymes of the $TCA$ cycle are located in the mitochondrial matrix except one,which is located in the inner mitochondrial membrane in eukaryotes and in the cytosol in prokaryotes. This enzyme is