Can anyone please help answer this chemistry question?

An engineering team designs a new rocket that is faster and lighter than any other model being produced. however, the materials end up being so expensive that no company can afford to buy them. which step of the engineering process should have addressed this problem? a. know the background. b. evaluate the results. c. identify a need. d. do the work.

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

What is the main reason why some developing countries fear the increase the free trade policies around the world?