(Solved): Pb#4:Fortheshown4barlinkage: a Write the kinematic synthesis vector equations that need to be so ...

$Pb\#4:\mathrm{For}\mathrm{the}\mathrm{shown}4?\mathrm{bar}\mathrm{linkage}:$ a Write the kinematic synthesis vector equations that need to be solved such that a point $P$ on the coupler link (link 2 in the Figure) passes through 3 specified precision points $\left(\overrightarrow{P_{ii}}\right)(i$ $=1,2,3$ ) while the coupler is at 3 corresponding specified angles $\left(89_{2i}\right)$. b List the unknown variables and count them c Determine the number of free variables in the kinematic synthesis equations