Please help me asap! Combinatorics:9. Three young brother-sister pairs from different families need to take a trip in a van. These sixchildren will occupy the second and third rows in the van, each of which has three seats. Toavoid disruptions, the siblings may not sit right next to each other in a row and no child may sitdirectly in front of his or her sibling. How many seating arrangements are possible for this trip?10. Every positive integer greater than 1 has at least two divisors and can be written as a uniqueproduct of some prime number/s with exponents. For example,5 =5 has two divisors (1 and 5 itself)6 = 2* x 3 has four divisors (1, 2, 3 and 6)16 = 2 has five divisors (1, 2, 4, 8 and 16).ad-1If a number n = p,X .. X Px p, where p, P, P3 P Pare primenumbers and a, a,, a. a,, a are the corresponding exponents of the prime numbers, howp.23k-1kα.many divisors does n have ?11. How many 5 digit positive integers are divisible by 5 and have at least one 6 as their digit?

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Combinatorics: 9. Three young brother-sister pairs from different families need to take a trip in a van. These six children will occupy the second and third rows in the van, each of which has three seats. To avoid disruptions, the siblings may not sit right next to each other in a row and no child may sit directly in front of his or her sibling. How many seating arrangements are possible for this trip?