I'll have a look at the Packet Tracer file...
Basically, for two hosts, you need a /30 mask, e.g.:
192.168.1.0/30 --> gives you two usable host IP addresses, 192.168.1.1 and 192.168.1.2
For 14 host addresses, you need a /28 mask, e.g.:
192.168.2.0/28 --> this will give you 14 hosts (192.168.2.1 - 192.168.2.14)
There are various tools available on the Internet that help with VLSM, such as the one linked below: