How serious is her form of leukemia?

MIL just diagnosed with leukemia. Not sure the type. She is in her late 50's and has flailing health. Three years ago she was diagnosed with lung cancer and went with treatment. Currently in remission. Then she was diagnosed with Parkinson's disease due to trembling and numbness, etc. Last year she had triple bypass heart surgery due to a clogged artery. Found out today she just got diagnosed with leukemia. Is this all related? Any thoughts on the prognosis? Hopeful she can beat this!