#3. Suppose you have a minimizationproblem and an algorithm A, that has an approximation ratio of 4. When run on some input I, A produced a solution with cost 20. What can you say about the optimal answer (let’s call it OPT)?Mark "true" or "false" for inequalities below and briefly explain your answer(s).• OP T ≥ 5• OP T < 5• OP T > 80• OP T ≤ 80

Using least squares fitting, you are to fit the data sets to the following models and solve for the parameters ai , where i is the index of the parameter. the input/output data for the systems are linked in the bblearn site. for each of the systems use matlab to plot the supplied data vs. the model fit on one plot. include your code in the solutions. (a) linear fit "lineardata.mat" y=a1x^3 + a2x^2 + a3x + a4 (b) plant fit "plantdata.mat g(s) = a1/(s + a2)

Assume the existence of a bankaccount class. define a derived class, savingsaccount that contains two instance variables: the first a double, named interestrate, and the second an integer named interesttype. the value of the interesttype variable can be 1 for simple interest and 2 for compound interest. there is also a constructor that accepts two parameters: a double that is used to initialize the interestrate variable, and a string that you may assume will contain either "simple", or "compound", and which should be used to initialize the interesttype variable appropriately. there should also be a pair of functions getinterestrate and getinteresttype that return the values of the corresponding data members (as double and int respectively).

What does 21 pilots middle aged name as a band 15 years prior to them naming their band 21 pilots?