[Bug Report] Broken notebook introductory-blog-sagemaker-core.ipynb

[jxuamazon]

Link to the notebook
sagemaker-core/introductory-blog-sagemaker-core/introductory-blog-sagemaker-core.ipynb

Describe the bug

1. broken code in block 3 . "s3_client = " is incomplete and is not used in the rest of the notebook

2. missing code block , in create endpoint configuration for real-time inference
   sagemaker_endpoint = Endpoint.create(
   endpoint_name=endpoint_name,
   endpoint_config_name=endpoint_config.get_name(),
   )

3. In test live endpoint
   Need to "import boto3"

4 In test live endpoint
Key = "sagemaker-core-intro-blog/processing/output/train/test.csv", should be
Key = "sagemaker-core-intro-blog/processing/output/test/test.csv",

5. In Invoke the endpoint

result = res['body'].read().decode("utf-8") should be
result = res.body.read().decode("utf-8")

6. In invoke the endpoint
   print_performance_metrics is not defined.

To reproduce
A clear, step-by-step set of instructions to reproduce the bug.

Logs
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You may also attach an .ipynb file to this issue if it includes relevant logs or output.