What are the prevailing absolute heights in the northern, middle and southern Volga regions?

Northern Volga region. 347 meters. The highest point of the Valdai Upland is the crown of Valdai.
Middle Volga region – 381.2 meters. Mount Observer, Volga Upland in the Samara Region, Zhigulevskie Gory.
A little further south in the Saratov and Volgograd regions there are heights of 369 (Khvalynskie mountains) and 359 meters (Gusselsky ridge).
Lower Volga region – Mount Bogdo, 172 meters above sea level. Caspian lowland.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.