A traveling wave along the x-axis is given by the following wave function ψ(x, t) = 3.3 cos(2.5x - 11.8t + 0.56), where x in meter, t in seconds, and ψ in meters. Read off the appropriate quantities for this wave function and find the following characteristics of this plane wave:
a) amplitude in meters
b) frequency in hertz
c) wavelength in meters
d)wave speed in m/s
e) the phase constant in ra