Determine the values of c so that the following functions represent joint probability distributions of the random variables X and Y : (a) f(x, y)=cxy, forx =1 ,2,3; y =1 ,2,3; (b) f(x, y)=c|x−y|, forx = −2,0,2; y = −2,3.

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?