1a. Sketch the graph offby hand and use your sketch to find the absolute and local maximum and minimum values off. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)

f(x) =1/8(7x1),x3

1b. Sketch the graph offby hand and use your sketch to find the absolute and local maximum and minimum values off. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)

f(x) =5/x,x5

1c. Sketch the graph offby hand and use your sketch to find the absolute and local maximum and minimum values off. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)

f(t) =3cos(t),3/2t3/2

1d. Sketch the graph offby hand and use your sketch to find the absolute and local maximum and minimum values off. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)

f(x) ={x² , if1x0

{2-7x , if 0 <x1