For each of the following values of K, find ways to express x*K using only the specified number of operations, where we consider both additions and subtrac- tions to have comparable cost. You may need to use some tricks beyond the simple form A and B rules we have considered so far. K Shifts Add/Subs Expression 31 1 -6 2 For each of the following values of K, find ways to express x*K using only the specified number of operations, where we consider both additions and subtrac- tions to have comparable cost. You may need to use some tricks beyond the simple form A and B rules we have considered so far. K Shifts Add/Subs Expression 31 1 -6 2