Trying to ID multiple fluid coolers/radiators

I'm replacing old failed radiator hoses, With plastic shroud off I can see a total of 4
separate radiators. Trying to identify what they are for since I thought the trans
cooler was inside the radiator. In pic: 1) the yellow indicated the engine
coolant/radiator, 2) the turquoise is the AC I believe, 3) the red one mounted low
looks like a factory auxiliary trans radiator, 4) the dark blue appears to be a very
small radiator with metal tubing connected.  I do have 2 metal lines connected to
the passenger side of the large engine radiator. So is that is the internal trans
cooler then what is the #3 red radiator for?  There are no lines connected to the
driver side of the large engine radiator, so would #4 dark blue be a separate oil
cooler?

Thanks in advance for the help!