
Explanation:
Box 1: Yes
The Pay as You Go model is billed on a per second basis and you can start or stop the service at any time - paying only for what you use.
Box 2: No
No, it is OpEx (Operational Expenditures).
OpEx: The business can achieve ROI immediately in many cases because the infrastructure is managed by the cloud provider.
CapEx: ROI is not usually realized until a long time after the purchase was made because the infrastructure needs to be set up and employees need to be trained.
Computers, servers, and other hardware needed for on-premises data centers are all examples of CapEx.
Box 3: Yes
Operational Expenditures (OpEx) are the ongoing costs related to day-to-day operations. A subscription fee for cloud services is considered (OpEx) the cloud provider is making the infrastructure investment upfront, and you only pay for the resources you need as you need them.
Reference:
https://azure.microsoft.com/en-us/pricing/purchase-options/pay-as-you-go/
https://blogs.vmware.com/cloudhealth/capex-vs-opex-cloud-cost-management/