Please answer using Matlab, thank you!

7) Find the prime factors of 15 8) Find the greatest common divisor of 12 and 16 9) Find the least common multiple of 3 and 5 10) Represent 5.5 as a fraction 11) Find 6! 12) Find all prime numbers less than 15 13) Find cos(1/3) 14) Find cos(60%) without converting 60 into radian 15) [3 pts] If A=[1 2 3 3 4 2 3] a) Find the mean value of the vector A b) Find the median of vector A c) Find the mode of vector A