Continuous Random Variable Normal The capacity of an isolated spread footing foundation under a column is modeled by a normal distribution with a mean of 300 kips and a COV of 20%. Suppose the colunm is subjected to dead load of 100 kips and a live load of 200 kips. Once you have standard deviation, you can substitute into the graph and find probability a) Calculate the probability of failure of the foundation under dead load only. b) Calculate the probability of failure of the foundation under the combined action of dead and live load. 0) If the probability of failure of the foundation is to be limited to 0.001, and the dead load carmot be changed, what is the maximum amount of live load that can be applied to the foundation