Hello. I am looking for some help. I can't figure out this problem at all and wonder if someone can explain how to solve the goal programming model please?

After years and years of cuts to its budget, a university library has re- ceived an endowment which generates an annual income of $10,000. The library has decided that it will use the money to pay for subscriptions to electronic versions of journals. There are fty such journals under consideration, and the price to sub- scribe to journal i for a year is pr. ': l....,50. Needless to say. 2?; pr > 10,000. so not all these journals subscriptions can be purchased. To help decide what to choose, for each journal the)r have three pieces of infonna tion: c,- is the number of times journal 1' is cited by articles in other journals, 3'; is the faculty's ranking of journals (higher is better), and q.- is 1 if there's a nearby library which has either a print or electronic subscription to journal i, and is 0 otherwise. The budget can be taken as a system constraint. There are several ranked goals. In decreasing order of importance they are: (ill The average number of citations of the subscribed journals should exceed the average number of citations of all fifty journals. (ii) The average faculty ratings of the subscribed journals should exceed r. (iii) The number of subscriptions to journals which are already available in nearby libraries should not exceed :3. {hr} The average number of citations of the subscribed journals which are not available in nearby libraries should exceed the average number of citations of all fty journals by at least 20%. A] Make a goal programming model for this situation