The answer should be N-Y-Y :
1: No because to create a Vnet to Vnet VPN you need to have a special gateway subnet. Here the Vnet has only /24 CIDR blocks of address space and this space is already taken by its Subnet. Hence there is no sufficient address space to create a gateway subnet and thus to establish a Vnet to Vnet VPN connection.
For 2 & 3 : They address spaces for the Virtual network don't overlap, we can thus establish a peering connection between the Virtuals Networks

yes yes no