3. Given that b = -3î + (4 + m)ĵ – k ‚č = –9î + 12j – (3 + m)k , ,Q%3D (5 + т,4,0 + m) аnd P %3 (-1,4 + т, —3). Find: The unit vector along the direction of a vector has Q as initial point and P as a...

Please help me in solving the question, I do not want a quoted answer or plagiarism.

Note: m=0

Extracted text: 3. Given that b = -3î + (4 + m)ĵ – k ‚č = –9î + 12j – (3 + m)k , ,Q%3D (5 + т,4,0 + m) аnd P %3 (-1,4 + т, —3). Find: The unit vector along the direction of a vector has Q as initial point and P as a terminal point а. b. Find the angle between the vectors b and ở using scaler product