Someone please help me ASAP

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u