Samples of coarse aggregate from a stockpile are brought to the laboratory. The following weights are found: Mass of moist aggregate sample as brought to the laboratory: (5290 + x*) g Mass of aggregates submerged in water: (3290 + x') g Mass of Saturated Surface Dry (SSD) Aggregate: (5220+) 9 Mass of Oven dried (OD) aggregate: (5210+) After drying, some of the coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained: Volume of bucket = (0.009+; 100000 m Weight of empty bucket = (8.35 + kg 1000 Weight of bucket filled with dry rodded coarse aggregate= a. Calculate the dry-rodded unit weight (25.34+ 1000 kg b. Calculate the percent voids in the aggregate x' = (The sum of the last three digits of your student number). For example, if your student number is XXXX1234, **is equal to 2+3+4=9.