Classify each chemical reaction:

$\backslash$table$[[$reaction$,\backslash$table$[[$type of reaction$],[($check all that apply$)]]],[2C{H}_{3}C{H}_3(g)+7O_2(g)4C{O}_2(g)+6H_{2}O(g),\backslash$table$[[$combination$],[$single replacement$],[$double replacement$],[$decomposition$]],\backslash$table$[[$precipitation$],[$combustion$],[$acid$-$base$]]],[C{H}_3(C{H}_2{)}_{3}C{H}_3(g)+8O_2(g)5C{O}_2(g)+6H_{2}O(g),\backslash$table$[[$combination$],[$single replacement$],[$double replacement$],[$decomposition$]],\backslash$table$[[$precipitation$],[$combustion$],[$acid$-$base$]]],[Ca(s)+C{l}_2(g)CaC{l}_2(s),\backslash$table$[[$combination$],[$single replacement$],[$double replacement$],[$decomposition$]],\backslash$table$[[$precipitation$],[$combustion$],[$acid$-$base$]]],[H_{2}C{O}_3(aq)H_{2}O(l)+C{O}_2(g),\backslash$table$[[$combination$],[$single replacement$],[$double replacement$],[$decomposition$]],\backslash$table$[[$precipitation$],[$combustion$],[$acid$-$base$]]]]$