83. Juri's custom printing t-shirt shop charges $12.00 per t-shirt plus a $20.00 setup fee. (a) Write a function that describes the cost C of printing nt-shirts at Juri's store. (b) Show that C(n) is an invertible function. (c) Find the inverse of C(n). What does this inverse func- tion n(C) represent in terms of C and n? (d) Use the function you found in part (c) to calculate the number of shirts you can produce with $150.