Four 1-in.-diameter pegs are attached to a board as shown. Two strings are passed around t...

Four 1-in.-diameter pegs are attached to a board as shown. Two strings are passed around the pegs and pulled with the forces indicated, (a) Determine the resultant couple acting on the board, (b) If only one string is used, around which pegs should it pass and in what directions should it be pulled to create the same couple with the minimum tension in the string? (c) What is the value of that minimum tension?