Please help me with this question as soon as possible. Thank you so much!

l3" Question 6 5 pts For the following vectorvalued function, nd the principal unit normal vector, and nd the binormal vector. r (t) = 4 cos(t)z' 4sin(t)j Show your work. If you get a wrong answer, you will still be awarded partial points, thus, show me your work neat and clean. Use a Math Editor or upload the image of your work as a PDF le. Or, you can work on a piece of paper, then take a picture with your cell phone, and then upload it. Refer: nd the principal unit normal vector and binomial vector 12pt V Paragraph V B I Q A '