SQL database

No hand writing please. I cant understand different handwriting.

Provide algebra and calculus expressions for the following queries EXERCISE CITY Name, State, Population) CROSSING(City, River) RIVERName, Length) Show name, state and population for cities with more thar 20000 people and crossed by the river Rio Grande or the river Red River 1. Find cities crossed by at least two rivers, showing the name of the city and the name of the longest river crossing such city 2