You are working as the project manager in a construction company and is currently working on the construction of a building. The company had just completed the construction of the first floor of the building. The preliminary estimate done by the quantity Surveyor is as shown in Table 2 below. Table 4: Preliminary estimate by Quantity Surveyor Duration 6 days Concrete Quantity 130 m Concrete Cost RM23,000 Workers Quantity 5 Workers Cost RM1000 The project director had queried the concrete work for the first floor and had asked you to verify the material and cost variances for the construction of the first floor of the building. Based on the data obtained from the site supervisor, you have found out that the duration of the concreting for the first floor is 5 days. You have also found that the quantity of concrete used for the first floor is 150m, with the cost of RM25,000 On top of that, you have found that only 4 sub-workers were used during the construction, with the cost of RM850. Prepare your answer to the project director by answering the following questions. a) Calculate the material price and usage variance, and the material cost variance for the concrete work. b) Calculate the labour price and usage variance, and the labour cost variance for the concrete work. c) Determine the status of the material and labour for the concrete work ofthe first floor. d) Explain on why this variance happened and give recommendations onhow to avoid it in future projects