Construct a huffman code for the following data: | symbol | a | b | c | d | _ | | | | | | | | | frequency | 0.4 | 0.1 | 0.2 | 0.15 | 0.15 | - encode `abacabad` using the code. - decode 100010111001010 using the code.

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

What precautions should you take to prevent injuries when dealing with heavy loads?

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way