Which of the following statements is true? 1. If skilled workers with high hourly rates of pay are given duties that require little skill and call for lower hourly rates of pay, this will result in a favorable labor rate variance. 2. The standard labor rate per hour should not include any employment taxes. 3. When more hours of labor time are necessary to complete a job than the standard allows, the labor efficiency variance is unfavorable. 4. If demand is insufficient to keep everyone busy and workers are not laid off, a favorable (F) labor efficiency variance often will be a result. Multiple Choice Only statement 3 is true. Both statements 2 and 3 are true. All of the statements are true. None of the statements are true