a$.$ Using conservation of energy statement, construct a one$-$dimensional equation of heat transfer for conduction.

b$.$ In real life, heat travels in three$-$dimensional. However, most of the problems learned from this course are in one$-$dimensional approach. State your argument on which condition$/$system best suits to justify the usage of one$-$dimensional approach in solving its heat transfer problems.

c$.$ Differentiate the process of heat transfer between conduction, convection and radiation

d$.$ Discuss the advantages and disadvantages of the three methods of heat transfer stated in Question $1($c$).$