DSE 2018 Question 39: Dummy variables and functional forms

Suppose you have run the regression $y = \alpha + \beta x + \gamma\,\mathrm{Urban} + \theta\,\mathrm{Immigrant} + \delta\,\mathrm{Urban}\times\mathrm{Immigrant} + \epsilon$, where Urban indicates living in a city and Immigrant indicates being an immigrant. The coefficient $\theta$ is interpreted as the ceteris paribus difference in $y$ between