Modify pod yaml

Refer: https://www.udemy.com/course/certified-kubernetes-application-developer/learn/lecture/12308344#questions at 2:27 minute.
Create a pod with the ubuntu image to run a container to sleep for 5000 seconds. Modify the file ubuntu-sleeper-2.yaml.
Given Hint:
Set the command option to [‘sleep’, ‘5000’]. Answer file at: /var/answers/answer-ubuntu-sleeper-2.yaml

But
I tried master $ cat ubuntu-sleeper-2.yaml
apiVersion: v1
kind: Pod
metadata:
name: ubuntu-sleeper-2
spec:
containers:

  • name: ubuntu
    image: ubuntu
    command: “sleep”
    args: “5000”

It didnt work
However this works

master $ cat /var/answers/answer-ubuntu-sleeper-2.yaml
apiVersion: v1
kind: Pod
metadata:
name: ubuntu-sleeper-2
spec:
containers:

  • name: ubuntu
    image: ubuntu
    command:
    • “sleep”
    • “5000”

what am I missing as per the lecture