Identify the labeled parts as $1, 2, 3, 4$ in cyclic photophosphorylation?

Series of enzymes involved in the given reactions of ${\mathrm{C}}_3$ cycle

(i) $\mathrm{A}\left[6\mathrm{c}\right]+\mathrm{B}\left[3\mathrm{c}\right]\to \mathrm{C}\left[4\mathrm{c}\right]+\mathrm{D}\left[5\mathrm{c}\right]$

(ii) $\mathrm{C}\left[4\mathrm{c}\right]+\mathrm{E}\left[3\mathrm{c}\right]\to \mathrm{F}\left[7\mathrm{c}\right]$

(iii) $\mathrm{D}\left[5\mathrm{c}\right]\to \mathrm{G}\left[5\mathrm{c}\right]$

(iv) $\mathrm{G}\left[5\mathrm{c}\right]+\mathrm{ATP}\to \mathrm{H}\left[5\mathrm{c}\right]$