Scalar-valued multivariable functions such as f(x, y) and f(x, y, z) — IITM BS previous year questions

Scalar-valued multivariable functions such as f(x, y) and f(x, y, z) is part of Multivariable Functions - Visualization, Week 9 in Mathematics 2. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.