The temperature distribution across a large concrete slab 50 cm thick, heated from one side, as measured by thermocouples approximates to the relation: T(x) = 60 - 50x + 12x2 + 20x3 - 15x4, where T is in deg.C and x is in metres. Considering an area of 5 m2, compute:a) heat entering and leaving the slab in unit timeb) heat stored in unit time. For concrete take k = 1.2 W/mK First solve this problem analytically, then use MS Excel to solve and plot temperature distribution. Compare both analytical and computational methods and report any differences in results.