Following the example of the circle class, design a class named stock that contains:
a)- a string data field named symbol for the stocks symbol.
b)- a string data field named name for the stocks name.
c)- a double data field named previousclosingprice that stores the stock price for the previous day.
d)- a double data field named currentprice that stores the stock price for the current time.
e)- a constructor that creates a stock with a specified symbol and name.
f)- a method named get changepercent() that returns the percent- age changed from previous closingprice to currentprice.
write a test program that creates a stock object with the stock symbol orcl, the name oracle corporation, and the previous closing price of 34.5. set a new current price to 34.35 and display the price-change percentage.

Now you’re on your own. include a short summary of this section with plots in your lab report. write a matlab script file to do steps (a) through (d) below. include a listing of the script file with your report. 1 the soundsc(xx,fs) function requires two arguments: the first one (xx) contains the vector of data to be played, the second argument (fs) is the sampling rate for playing the samples. in addition, soundsc(xx,fs) does automatic scaling and then calls sound(xx,fs) to actually play the signal. mcclellan, schafer, and yoder, dsp first, 2e, isbn 0-13-065562-7. prentice hall, upper saddle river, nj 07458. c 2015 pearson education, inc. 4 mcclellan, schafer and yoder, signal processing first. prentice hall, upper saddle river, new jersey, 2003. c 2003 prentice hall. (a) generate a time vector (tt) to cover a range of t that will exhibit approximately two cycles of the 4000 hz sinusoids defined in the next part, part (b). use a definition for tt similar to part 2.2(d). if we use t to denote the period of the sinusoids, define the starting time of the vector tt to be equal to t , and the ending time as ct . then the two cycles will include t d 0. finally, make sure that you have at least 25 samples per period of the sinusoidal wave. in other words, when you use the colon operator to define the time vector, make the increment small enough to generate 25 samples per period. (b) generate two 4000 hz sinusoids with arbitrary amplitude and time-shift. x1.t / d a1 cos.2