Write a short Java function that takes an integer n and returns the sum of all the integers smaller than n. Problem R-1.12. pg. 57 Write a short Java function that takes an integer n and returns the sum of all the odd integers smaller than n. Problem R-1.13. pg. 57 Write a short Java function that takes an array of ini values and determines if there is a pair of numbers in the array whose product is even. Problem C-1.2. pg. 57 Write a short Java method that takes an array of float values and determines if all the numbers arc different from each other (that is. if they arc distinct). Problem C-1.3 pg. 57 Write a short Java program that takes two arrays a and b of length n storing int values, and returns the dot product of a and b. That is. it returns an array c of length n such that c(i) = a(i). b[i]. for i= 0.1.2.... n-1. Problem C-1.7 pg. 57. What is the COMPLEXITY (in big-Oh notation) of each algorithm