5/3 cos(alpha) - 5/2 cos(phi) + 11/6 - cos(alpha - phi) = 0 a. solve the four-bar linkage problem for an input of alpha = 40degree by interval halving. remember that the angles must be expressed in radians. let the initial value of phi be 30 degree. use a convergence criteria of epsilon = |phi_1 - phi_2| = 0.1. hint: it will take over 20 iterations to obtain an answer for 