Provide the correct default subnet mask based on their default class in decimal form the following addresses. The first one is completed for you.

$\backslash$table$[[1.69\mathrm{.}135\mathrm{.}109\mathrm{.}63,255\mathrm{.}0\mathrm{.}0\mathrm{.}0],[2.200\mathrm{.}234\mathrm{.}55\mathrm{.}42,],[3.190\mathrm{.}244\mathrm{.}120\mathrm{.}44,],[4.162\mathrm{.}215\mathrm{.}227\mathrm{.}228,],[5.62\mathrm{.}37\mathrm{.}150\mathrm{.}174,],[6.173\mathrm{.}83\mathrm{.}230\mathrm{.}40,]]$