What os the maximum number of 2-node clusters that can share a vSAN Shared Witness host in vSAN 7.0 U1?

Which solution can automate the deployment of a vSAN cluster as part of a full Software-Defined Datacenter?

A new vSAN Cluster with four hosts has to be designed for a single site architecture.
Which design decision is correct?

The DevOps team of an organization wants to deploy their new cloud native application with persistent storage on a dedicated vSAN cluster. The storage administrator is tasked to configure the vSAN cluster and leverage the vSAN Direct feature.
Which two requirements must the administrator meet to complete this task? (Choose two.)

A vSAN administrator of a network isolated vSAN environment wants to upgrade the environment from the vSAN 7.0 to the vSAN 7.0 U1 using vLCM.
Which option, if any, should be used as a depot in this case?