b$.$ During winter, the number of daily air routes between Vancouver and Whistler, British Columbia increases, as does the price of a ticket.

$\backslash$table$[[$In this instance, the,demand and supply $-,$must have,risen $-],[$demand$,,$ risen$],[$ demand and supply,al certified,$],[$of billable hours, but th$,$supply,CPA remai,ns the same.$]]$