% equilibrium a)

 eqYa = Ra(2) + (1/sqrt(2))*Ra(1) + Ra(4);

 eqXa = Ra(3) - (1/sqrt(2))*Ra(1);

 eqMoma = (1/sqrt(2))*b*Ra(1) + 2*Ra(4)*b;

 % equilibrium b)

 eqYb = Rb(2) + (1/sqrt(2))*Rb(1) + Rb(4) - F - F/2;

 eqXb = Rb(3) - (1/sqrt(2))*Rb(1);

 eqMomb = (1/sqrt(2))*b*Rb(1) + 2*Rb(4)*b - F*(b+0.5*b)-0.5*F*(0.5*b);