You have been hired to design a family-friendly see-saw. Your design will feature a uniform board of massMand lengthLthat can be moved so that the fulcrum (pivot) is a distanced from the center of the board. This will allow riders to achieve static equilibrium even if they are of different masses, which is typical. You have decided that each rider will be positioned so that his/her center of mass will be a distancexoffsetfrom the end of the board when seated, as shown. A child, seated on the right, has massm, and an adult, seated on the left, has a mass that is a multiplenof the mass of the child. Calculate all torques relative to the position of the fulcrum, and treat counterclockwise toques as positive.