31. With interactive marketing,

A. the seller controls the kind and amount of information presented to the buyer.
B. buyers and sellers communicate face-to-face in the traditional marketplace.
C. a website high in media richness is necessary for an exchange to take place.
D. the buyer controls the kind and amount of information received from the seller.
E. real time transactions are impossible.

In a heat transfer course, we can derive the equation for the temperature distribution in a flat rectangular plate. in this example, we will look at a plate at steadystate with three sides being held at t1, and one side held at t2. the temperature for any location on the plate, t(x,y), can be calculated by where create a function (prob3_5) that will take inputs of vectors x and y in feet, scalar n, scalars l and w in feet and scalars t1 and t2 in degrees fahrenheit. it will output a matrix t which is the temperature of each x and y locations. t will have the number of columns equal to the number of elements in x and rows equal to the number of elements in y. though this can be done without loops (perhaps more efficiently), your program must use a nested loop.