During the constructionof a house, six joists of 24 feet each must be trimmed to the cor-rect length of 23 feet. The operationsfor cutting a joist involve the following sequence: 1.~ Operation 1. Place joist on saw horses 2. Measure correct length (23 feet) 3. Mark cutting line for circular saw 4. Trim joist to correct length 5. Stack trimmedjoist in a designated area Time (seconds) 15 5 5 20 20 1.2 Three persons are involved: Two loaders must work simultaneously on operations 1,2, and 5, and one cutter handles operations 3 and 4. There are two pairs of saw horses on which untrimmedjoists are placed in preparationfor cutting, and each pair can hold up to three side-by-side joists. Suggest a good schedule for trimming the six joists.