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Five work packages are assigned for a concreting crew; takeoff quantity, percent waste and efficiency factor are estimated for each work package as shown in the table. Technology constrained precedence relationships are as: Foundation must be completed before executing "Wall to Elevation" and "Slab"; all the Beams Elevated must follow pouring "Wall to Elevation". This crew has crew hourly rate of $370 per hour; crew hourly production under normal circumstances (efficiency factor 1.0) is 12CY per hour. The concrete unit cost is $30.90 per CY delivered to site. The concreting crew handles one work package at a time. (CY: Cubic Yard) a) Estimate total labor (crew) cost for the five work packages (rounding to $0.01 ) b) Estimate total material cost for the five work packages (rounding to $0.01 ) c) Determine total crew hours required to complete the five work packages (rounding to 0.1hr )