Consider a newly designed structure. The capacity of the structure is estimated to be c-bar = 12,500 kips, and the standard deviation ?c = 5,000 kips. It is assumed that the capacity is normally distributed. The anticipated load on the structure will be l-bar = 6,000 kips, with an uncertainty of ?l = 1,800 kips. The anticipated load is also normally distributed. Find the unreliability of the structure.