4 Problem #4 Starting from the wave equation: red red ) (2) BLT, t) = 2cm - sin (irt + 31: + on SEC m 1. write down the value [or values if more than one} of (#0 E 2w that would lead to a displacement in II: = 2m at t = Uses equal to 1cm. Can you write at least two such that 2. is the wave traveling towards positive or negative 1-: values? 3. how should you modify the equation for describing a similar wave traveling in the opposite direction