$4$ bits were borrowed from the host portion. Please help. Thank you Now come up with a better addressing scheme using VLSM$.$ Start with the same $4$ bits borrowed from the host portion of $192\mathrm{.}168\mathrm{.}1\mathrm{.}0/24.$ Label each of the LANs with a subnet. Then subnet the next available subnet to provide WAN subnets without wasting any host addresses. Label Figure $9-3$ with the subnets. Address Space $192\mathrm{.}168\mathrm{.}1\mathrm{.}0/24$ RTA RTC RTB Figure $9-3$ Addressing Design Exercise $1$ Topology: VLSM Subnets List the address space that is still available for future expansion.