Marketing: task 0001

The trading company owns four typical stores in different parts of the city. The range of services, as well as the quality of service and the level of qualifications of staff in all stores are the same. The table presents data on the amount of income (in thousand rubles) for the first 13 weeks of the year for all stores of the company.

Week No. Shop No. 1 Shop No. 2 Shop No. 3 Shop No. 4
1 10540 7066 19054 12870
2 11024 7759 18980 11229
3 9810 7431 21760 12765
4 8121 6870 19087 13930
5 8499 7405 22531 13991
6 9617 7690 22972 13408
7 10045 8204 20032 12842
8 10068 7200 21154 12540
9 9152 7190 23078 11987
10 10100 6678 21317 11444
11 9980 6897 20004 12689
12 10432 7020 19308 13022
13 11310 7456 19690 13432

Questions:
a) What is the likelihood that within a year the company will be able to repay a loan of 400 million rubles. at a 30% annual rate, if the company can allocate no more than 20% of the total monthly income to pay off the loan? To solve the problem, assuming that the demand for the firm's goods is relatively stable, i.e. not subject to seasonal and other fluctuations that change its normal nature.
b) What marketing activities should be carried out in order to repay the annual loan amount?
When solving the problem, it is recommended to use the method of probabilistic-statistical estimation.