A wave on a string is described by the following equation (assume the +x direction is to the right).

y = (13 cm) cos[πx/(5.8 cm) - π t/(17 s)]

(a) What is the amplitude of this wave? cm (b) What is its wavelength? cm (c) What is its period? s (d) What is its speed? cm/s (e) In which direction does the wave travel?