Correcting wave "a" of "(4)", painting some more detailed ideas on wave (5), and hoping my country's situation won't be the fundamental reason for at least some part of the ED's final leg...
Please be aware I'm an amateur in these things (as you've probably seen already) and that I haven't seen this counting anywhere else, so it's most probably wrong. :-)
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Description''s correction: ... some part of the LD''s final leg...