Question is attached below. Thank you for your help!

(a) Explain in your own words how the Romer model explains divergence of growth rates across countries as opposed the convergence implied by the Solow model? (b) Choose the correct answer below and fully explain your answer: Population (labor) in the Romer model is formally linked with change in technology through: a. number of ideas b. proportion of the labor force working on research c. no formal linkage d. none of the above