If you could write in the picture below, it will be a great help.

1. Marine biogeochemical processes create vertical gradients in chemical parameters in the ocean. In the cartoon below, please indicate: (10p) a) The major organic carbon cycling processes and the locations in the water column where they are dominant. Please write the reactions. b) Where in the water column do you expect to find N2 fixation, nitrification and denitrification? c) Based on the vertical oxygen profile in panel a), what would vertical profiles of dissolved inorganic carbon and nutrients look like? Please illustrate your answers in panel c)