Macmillan Learning The motion y(x, t) of a vibrating system is described by y(x,t) = Age at sin(kx - cot) where x denotes a distance in meters and denotes a time in seconds. Denoting units with fractions using the "/" operator and units with products using the "*" what are the SI units of the quantity a? units of a: what are the SI units of the quantity k? units of k: what are the SI units of the quantity @? units of w: operator, e.g., "1/kg" and "kg*s,"