Is an annual report a primary source or a secondary source

Even though both ww1 and ww2 were in many ways the same conflict with basically the same countries facing off against each other, the way each war started was significantly different. the question is how what were the differences on how they started

Which battle was one of the most devastating for

The current population of a city can be represented by "p." the population is expected to increase by 6.5% next year. write an expression in simplest form that represents the expected population next year.