consider the walshaert steam-engine valve gear illustrated in the schematic above. note that links BDV and DIG and CFA are solid links and each has tree pin connections at the lettered locations, at point G there is a turning-block link which slides on the link with joints H and O. D PROBLEM 2 Consider the Walshaert steam-engine valve gear illustrated in the schematic above. Note that links BDV and DIG and CFK are solid links and cach has three pin connections at the lettered locations. At point G there is a turning-block link which slides on the link with joints Hand O. To write the mathematical expressions using a qwerty keyboard use computer programming notation. Spell out Greek letters in English. Use the asterisk for the multiplication symbol. Represent summation over values of a variable x as SUM(xi). a) How many links are there in this mechanism? b) How many joints are there in this mechanism? c) Write the equation derived in class for the degrees of freedom of a mechanism. d) Determine the number of degrees of freedom for this mechanism. In a large office building, there are 500 combinations of personal computers and printers. The harmonic spectrum of the total current shows the third harmonic (70%), followed by the fifth (60%), seventh (40%), and ninth (22%). Assume that each PC's fundamental current is 1 A. if a 500 KVA, 12.47/480 V transformer supplies the building at 0.95 lagging PF, determine the following: 1. Plot a layout of the system of this problem. 2. The total rms load current. 3. The total fundamental load current. 4. The third harmonic load current. 5. The fifth harmonic load current. 6. The seventh harmonic load current. 7. The ninth harmonic load current. 8. The THD index of the load. 9. The transformer neutral current. 10. Suggest with schematic diagrams, three different methods to mitigate the THD.