Each of the functions below models the water level in a local lake, in feet above sea level as a function of time in months. Write a sentence that interprets how each function changes. a) ð‘Ž(ð‘¡) = 550 − 0.5ð‘¡ b) ð‘(ð‘¡) = 550(1.01)ð‘¡ c) ð‘(ð‘¡) = 550ð‘’^(-0.02ð‘¡) d) ð‘‘(ð‘¡) = 2.5ð‘ ð‘–ð‘›(2ðœ‹12ð‘¡) + 550