**I am having hard time to solve this. I need help with explanation. Thank you! **

**Use the function below (whose parameters qualify it as a STC function) to answer the questions.**

**STC=30+18Q-2.7Q**^{2}**+ 0.15Q**^{3}

^{}

**1)Total fixed cost is $________**

**2)Obtain the AFC function from (a) and write it here _____________**

**3)Obtain the AVC function contained in the STC function and write the AVC function here __________________________**

**4) Write here the MC function __________________________**

**5) Find the value which AFC approaches as Q gets very large. **

**What happens fixed costs per unit (AFC) as production quantities get ever larger.**

**6) Find the value of Q at which AVC is a minimum.**

**7) Is productive efficiency at the value in (f) greatest or least?**

**8) Demonstrate that the value of SMC equals the value of AVC at the value of Q where AVC is a minimum. Hint: The level of Q you found in (f) is where AVC is a minimum. If you plug this level of Q into AVC (see c) and also into MC (see d) the two outcomes should be the same if SMC crosses AVC at this level of Q.**

**9) Find the value of Q where increasing returns ceases and diminishing returns begins. Hint: Diminishing returns begins at the level of Q where MC is a minimum.**