<span>The First Caliph, Abu Bakr (632-634 A.C.) <span>The Second Caliph, 'Umar (634-644 A.C.) </span><span>The Third Caliph, Uthman (644-656 A.C.) </span><span>The Fourth Caliph, Ali (656-661 A.C.) </span></span><span>
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Difficult trade-offs, "building" accountability for action, <span>how can we bring together the right stakeholders at the right time in the right place? hope it helps :)
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The answer is Physiological
The answer is on kgb, thats were you can get all of your answer from.
Sebastian was recorded to take 3 voyages