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You needn't worry about bootstrap actions, so just click Continue through this screen.
In the Review screen, confirm that your instance types, instance counts and key pair configuration are all correct. If not, click the Back link and amend your settings as appropriate. Once everything is correctly configured, click Create Job Flow.
Job flow created
If all goes well, you should see this screen confirming that your EMR job flow has been created. Click Close so that you can monitor the status of your cluster as it's stood up.