Hello, I have a Maths Question I have tried and tried to get my head around these but no joy

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I have uploaded the questions, ideally I need help with Question 1 & 2

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I have provided a link to the Unit 3 Information in the Question comments

I have provided a link in this question comments with access to question 1 & 2

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hi I have provided you a Dropbox link above to the questions You requested many thanks

(a) (i) Use a factor tree or similar method to write 3960 as a product of prime factors. Display your factor tree in your answer. If you choose to use an alternative method, then clearly show your working: just writing down the answer is not sufficient. [4] (ii) Calculate 7 1 13 9 3 18 ' leaving your answer as a fraction in its simplest form, showing all your working [4] (iii) Simplify the surd 3V7 V21 - V48 by writing it as a surd in its simplest form, showing your working. [3] (b) A group of 441 students are required to take a test. Of these, 392 actually take the test, and 49 are absent that day. (i) Write down the ratio of the number of students who take the test to the number of students who are absent. Simplify this ratio as far as possible. [3] (ii) Of the 392 students who take the test, the numbers of students obtaining grades A, B, C and D are in the ratio 5 : 12 : 8 : 3. respectively. Calculate the number of students obtaining each grade. Explain how you could check that your answers are plausible. [4] (c) Rafael Nadal played in tennis matches for a total of 22 hours and 28 minutes to win the 2022 Australian Open men's singles title. The winner's prize money was $2 875 000 (Australian dollars). (i) Calculate how long Rafael played (in minutes) for each dollar that he won in this tournament. Give your answer to three significant figures in both ordinary notation and scientific notation. [4] (ii) Calculate how much Rafael won (in Australian dollars) for each hour that he played in this tournament. Give your answer to three significant figures in both ordinary notation and scientific notation. [3]An IT company develops software for the nancial services industry. It tests its code using an industry standard software package. Aiming to expand its business and be more competitive in the sector, the company has decided to pilot an inhouse software package to test its code. A company researcher wishes to compare the times taken for each package to complete tests. Both software packages were run on 20 occasions testing the same code. The researcher records the times taken on each occasion, and these are shown in Table 1. Table 1 Comparison of test times in minutes for the industry standard and.r in-house software testing packages Test number Industry standard software package In-house software package 1 457 415 2 437 435 3 444 460 4 432 454 5 476 448 6 468 437 7 444 428 8 448 435 9 656 437 10 462 455 11 460 458 12 454 439 13 467 447 14 491 451 15 466 435 16 476 448 17 436 425 18 449 432 19 492 454 20 486 444 a i Which of the three t pes of investi ation discussed on Y g pages 210214 of Unit 4 is this? Explain your answer briey. (ii) Are these primary or secondary data, from the researcher's point of view? Explain your answer briey. (b) Spend a few minutes scanning these datasets by eye. (i) List any three features that you should be looking for when scanning datasets by eye. (ii) Comment on whether or not you think there might be a problem with each of the most extreme values (maximum and minimum) in each column. [2]