More basic concepts: alternative shapes of yield curves A yield curve is a graphical representation of the relationship between the yields and the maturities of securities issued by a given borrower in a given currency on a given date. The mathematical relationship between these two variables, the yield and the maturity, is called the term structure of interest rates, and the graphical relationship (plotted curve) is called the yield curve. A yield curve can exhibit a variety of shapes, and the general shapes have been given a specific name. Identify the name of the yield curve that matches the pattern described as follows:

(a) Long-term rates are greater than short-term rates.
(b) The yield curve exhibits a downward-sloping curve.
(c) Long-term rates are equal to short-term rates.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?