Write the structural formulae for the compounds that yield the following products on reductive ozonolysis.
`a.` `2 mol ` butan`-2- `one
`b.` Methanol `+`
`c.` Pentan `-3-`one `+` Glyoxal `+` Propanal
`d.`
`e.` `2 mol`
`f.` Pentan `-2-`one `+2 - `Methyl butanal
`g.`
