Procedure TreeSearch (x, K) i if (x = NIL) or (K = x. key) then 2 return (x); 3 else if (K < x. key) then 4 | TreeSearch (x. left, K); 5 else 6 TreeSearch (x. right, K); 7 endConsider a binary search tree where each tree node v has a field v. sum which stores the sum of all the keys in the subtree rooted at v.

We wish to add an operation SumLE(K) to this binary search tree which returns the sum of all the keys in the tree whose values are less than or equal to K.

(a) Describe an algorithm, SumLE(K), which returns the sum of all the keys in the tree whose values are less than or equal to K. Give pseudo-code for your algorithm. Your algorithm should take the same time as operation TreeSearch from slide 7.12.

(b) Explain why your algorithm is correct, i. e., why it returns the sum of all the keys whose values are less than or equal to K.

(c) Analyze the running time of your algorithm in terms of the size n and height h of the binary search tree.

the benefits of raising bc’s minimum wage to $15 through a

series of pre-announced staged increases far outweigh the likely

costs. claims that such an increase will lead to massive job losses

in low-wage sectors of the economy are not credible.

• an increase to $15 would result in some job losses. however,

the likely impact is less than a 1 per cent reduction in the overall

provincial employment rate, and a 7.6 per cent reduction in the

employment rate for those currently making between $10.25

and $15 per hour.

• the large job loss impacts predicted by some opponents of

minimum wages misrepresent the existing economic research. in

reading and using that research, it is important to recognize that

estimates showing job loss effects of minimum wage increases

apply only to teenagers. estimated effects for young adult and

adult workers range from insignificant to non-existent.

• focusing on teenage workers plays up an inaccurate stereotype

about who earns very low wages in bc and leads to exaggerated

claims about job losses. only 26 per cent of those currently making

between $10.25 and $12 are teenagers, and only 5 per cent

of those making between $12 and $15 are teenagers.