this is the same as the one I posted before but with the experiment details. CO2 per breath Measure 20mL of water in you

[answerhappygod]

this is the same as the one I posted before but with the experiment details.
CO2 per breath
Measure 20mL of water in your
graduated cylinder and pour into a 100mL beaker.
Using a pipette, place 4 drops of bromothymol blue into the solution containing water.
At rest, exhale into the solution at a constant rate and inhalation/exhalation time per breath and continue exhaling until the solution turns yellow (Maintain a consistent breathing rate; approx. 2-2.5 second inhale and 2-2.5 second exhale per breath).
Discard used BTB solution in waste beaker provided.
Repeat TWO trials for each participant.
Repeat steps 1-4 after 1 minute and 2 minutes of jumping jacks. Be sure to immediately begin breathing into the straw once the exercise has finished and maintained the breathing rate as per step 3.

dependent variable - jumping jacks
dependent variable- the time it takes for the solution from blue to yellow
questions :
Based on your results, what can you conclude about both the amount of CO2 per breath and the amount of CO2 produced per minute and how can you relate this directly back to this lab and cellular respiration? Be sure to use your graphs to support your conclusions.
b) Briefly explain the purpose behind using BTB in this experiment and how it relates to this lab.
c) Include all controlled variables (at least 5) and be sure to comment on whether or not you were able to control for them and why. If you weren’t able to, be sure to explain what errors these may have caused in your final data and how you could control for them in future experiments. only the graphs are referred to in this part (eg. CO2 per breath OR CO2 per minute)
this is the graph for CO2 per minute and breath:

This Is The Same As The One I Posted Before But With The Experiment Details Co2 Per Breath Measure 20ml Of Water In You 1 (372.77 KiB) Viewed 12 times

This Is The Same As The One I Posted Before But With The Experiment Details Co2 Per Breath Measure 20ml Of Water In You 2 (372.77 KiB) Viewed 12 times

I need answers to questions 4. a and c.please ignore the other questions (only for biology) I post this question is the same but with more information thank you.
CO2 per minute P3-Group 2 P3-Group 4 P4-Group 2 P4-Group 2 40 30 Time (s) 20 10 Resting 1 min jumping jacks 2 min Jumping jacks CO2 per minute

CO2 per minute P3-Group 2 P3-Group 4 P4-Group 2 P4-Group 2 40 30 Time (s) 20 10 Resting 1 min jumping jacks 2 min Jumping jacks CO2 per minute