http://courses.media.mit.edu/2010fall/mas622j/ProblemSets/ps2/ps2_sol.pdf answer c you can see in the file the same problem exactly the number is different

In a particular binary hypothesis testing application, the conditional density for a scalar feature y given class w1 is Given class w2 the conditional density is a. Find k1 and k2, and plot the two densities on a single graph using Mat-ab/Octave b. Assume that the prior probabilities of the two classes are equal, and that the cost for choosing correctly is zero. If the costs for choosing incorrectly are C12 1 and C21 v5, what is the expression for the Bayes risk? c. Find the decision regions which minimize the Bayes risk, and indicate them on the plot you made in part (a) d. For the decision regions in part (c), what isthe numerical value of the Bayes risk