Fire load (MJ/m2) is the heat energy that could be released per square meter of floor area by combustion of contents and the structure itself. The following cumulative percentages are for fire loads in a sample of 388 rooms: Value 0 150 300 450 600 750 900 Cumulative % 0 19.1 37.6 62.4 77.0 86.5 93.0 Value 1050 1200 1350 1500 1650 1800 1950 Cumulative % 94.8 97.8 98.1 99.5 99.6 99.8 100.0 (a) Construct a relative frequency histogram. WebAssign Plot WebAssign Plot WebAssign Plot WebAssign Plot Comment on interesting features. (Select all that apply.) The typical middle value is somewhere between 150 and 300. The typical middle value is somewhere between 300 and 450. The relative frequency distribution exhibits a large negative skew. The relative frequency distribution is symmetric. The relative frequency distribution exhibits a large positive skew. (b) What proportion of fire loads are less than 600