Please Help with both Questions

Problem 1. (15 pts) In 1937, the Ohio River at Cincinnati reached a river stage of 80ft. If the exceedance probability of this river stage is 0.0125, what is the return period of this event? What is the exceedance probability of this event in 2018 based on the stationary assumption? Discuss about possible factors that may undermine the stationary assumption. Problem 2. (15 pts) Textbook Ch2, Exercise 4, question (a). 4. The table below gives average precipitation, streamflow, and temperature for four large rivers. a. For each watershed, estimate average potential evapotranspiration (PET) via equation (2B4.2) and determine whether each watershed is water-limited or energy-limited (section 2.2.8.3)