Give the following sample code, write the following programs: • An iterator class called Iteratefirstn that implements __iter__() and __next__() methods where next method should raise an exception for the cur index if it is passed the last element otherwise set cur index to the next index and advance the index by one, i. e. cur, num = num, num+1. Instantiate the class to calculate sum of 1000000 elements similar to the example. • Instead of implementing the class, write a generator function that does the same thing.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.