How do I do this, thank you

4. The following table shows the amount of output produced by a firm using two types of inputs, labour and capital. Output Input Labour Capital 150 22 40 330 44 80 660 88 160 1,320 176 320 2,376 352 640 a) Is the firm operating in the short run or long run? Why? [4 marks] b) Identify the range of output, when the firm experiences: [6 marks] i. Increasing returns to scale ii. Constant returns to scale iii. Decreasing returns to scale