A bicycle is lifted off the ground and placed on a stand so that maintenance can be performed. This allows the front wheel to spin freely along its axle. The wheel has a reflector (m1 = 40 g) located R1 = 25 cm radially outward from the center. There is also a pebble with mass m2 stuck in the tire treads and located R2 = 33 cm radially outward from the center. The wheel is rotated until it reaches a position of equilibrium; at this moment the reflector is located at the 5 o'clock position, and the pebble is located at the 9 o'clock position. What is the mass m2 of the pebble?

please draw a representation too