RiskTriangAlt, RiskTriangAltD
Description 
RiskTriangAlt(arg1type, arg1value, arg2type,arg2value, arg3type,arg3value) specifies a triangular distribution with three arguments of the type arg1type to arg3type. These arguments can be either “min”, “m.likely”, “max”, or a value between 0 and 1 to specify a percentile.

Examples 
RiskTriangAlt("min",2,"m. likely",5,95%,30) returns a triangular distribution with minimum 2, and most likely value 5, and 95^{th} percentile 30.

Guidelines 
With RiskTriangAltD, any entered percentile values are cumulative descending percentiles, where the percentile specifies the probability of a value greater than or equal to the entered value. 