Based on the result, Tiana thinks that her answer is incorrect, but she does not know where there is a mistake. Help Tiana to find mistakes by answering the following questions:

a$)$ What is a target unit in this problem? Did student$$s application of the dimensional analysis method justify the correct target unit? Explain why.

b$)$ List all the errors in Tiana$$s calculations. Explain why do you think it is an error.

c$)$ Explain the purpose of the second fraction in calculations.

d$)$ Write your solution to the problem: