Problem $4$:

$\backslash$table$[[$Given:$],[$Host IP Address:,$192\mathrm{.}168\mathrm{.}1\mathrm{.}245],[$Original Subnet Mask,$255\mathrm{.}255\mathrm{.}255\mathrm{.}0],[$New Subnet Mask:,$255\mathrm{.}255\mathrm{.}255\mathrm{.}252]]$

$\backslash$table$[[$Find:$],[$Number of Subnet Bits,$],[$Number of Subnets Created,$],[$Number of Host Bits per Subnet,$],[$Number of Hosts per Subnet,$],[$Network Address of this Subnet,$],[$IPv$4$ Address of First Host on this Subnet,$],[$IPv$4$ Address of Last Host on this Subnet,$],[$IPv$4$ Broadcast Address on this Subnet,$]]$