O2BCO4 is a four-bar linkage. O2 and O4 are fixed centers on a horizontal line 10 in apart. O2B is a link 5 in long oscillating about O2. O4C is a crank 2 1⁄2 in long which rotates about O4. BC is a...

O2BCO4 is a four-bar linkage. O2 and O4 are fixed centers on a horizontal line 10 in apart. O2B is a link 5 in long oscillating about O2. O4C is a crank 2 1⁄2 in long which rotates about O4. BC is a connecting rod 11 1⁄2 in long. O2 is to left of O4. A link, EF, 6 in long, is pinned to O2B at E, 1 1⁄2 in from B. Another link, GF, 3 1⁄2 in long, is pinned to link BC, 4 in from C. These links, EF and GF, are pinned together at F in their upper position.
Trace the paths of the points F and G while driver O4C makes 1 complete revolution. Find points for each 15o position of O4C and any others necessary in order to secure a smooth curve.