please solve

A vertical spring scale can measure weights up to 210 N . The scale extends by an amount of 12.5 cm from its equilibrium position at 0 N to the 210 N mark. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.85 Hz . Part A Ignoring the mass of the spring, what is the mass m of the fish? Express your answer in kilograms. View Available Hint(s) ? m= kg Submit