Yikes.
Okay... pale lower leaves in flower... not terrible.
Worry about those black spots first.
First off, go get a bottle of Serenade right away. It's an organic fungicide made of bacillus sp. bacteria that is perfectly safe to use in flower. Give your soil a good drench next time you water, using it as directed. That will help get the mold under control if that's what it is.
There's also the possibility of a viral infection, in which case your plant is cooked but youmight be able to limp it through flower anyway.
In the meanitme, Si, Ca, and K help your plant's immune system. A high K fert and some Silica Blast will be helpful.
Low humidity prevents mold. If you have LEAF mold, but rot is a DEFINITE. Get your %RH down to like 30% NOW.
Get your temps up in range too: D70-80 / N60-70.
urrr good luck... post back how it's going

Oh also if you have more than just that one plant, and you can isolate it from the healthy ones, DO IT!!!!