Consider an instantaneous discharge of a pollutant mass M at a given point of a river channel. Which of the elementary signals would best describe the time and point (space) mass discharge? Make the...

Consider an instantaneous discharge of a pollutant mass M at a given point of a river channel. Which of the elementary signals would best describe the time and point (space) mass discharge?

Make the graphical representation of the following signals: u₀(t) ⋅ v₀(t), u₀(t − t₀) ⋅ sin(ω t) and u₀(t − t₀) ⋅ e^−1
0t.