Its my last question:( any tips help

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?