Answer to the Question No: (a) 

 What I have learnt from the class are:- Tenacity, Breaking extension, Work of rupture, Initial modulus, Work factor, Work recovery, Elastic recovery, Yield stress, Yield strain, Yield point, Breaking load etc. 

Answer to the Question No: (b) 

I have already learnt all the content regarding this lecture. 

 Answer to the Question No: (c) 

 I have understood the lecture. So, there is no topic which I have to learn yet. 

 Answer to the Question No: (d) 

 Initial modulus or stiffness: Fiber stiffness is commonly determined by the initial slope of the stress-strain curve at the origin. This is commonly known as the initial modulus; the higher initial modulus, the stiffer the fiber and the lower initial modulus, the more flexible the fiber.