*** I NEED THIS IN MATLAB CODE PLEASE***

EXERCISE 3 (5 pts): SAVINGS ACCOUNT OPERATIONS

You began on 1 January 2015 by making an initial deposit of $5,000 to open a savings account at Bank of America. This account pays 0.135% interest per month. Every seven months, at the end of the month, you withdraw $400 to pay your accumulated credit card balance. At the end of December each year you receive a $2,000 end-of-year bonus from your employer which you deposit into your account. On 30 June 2017 (that is, 30 months after your initial deposit), your account's interest rate increases from 0.135% per month to 0.25% per month for the next six months (until month #36), after which it drops from 0.25% per month to 0.125% per month and then stays fixed (i.e., constant forever).

Question 1: Question 2: Question 3:

What is your account balance on 1 January 2020 (i.e., after 60 months have passed)? Prepare a plot showing the variation in your account balance from the beginning of month 1 to the beginning of month 61.

At the beginning of which month will you have accumulated more than $8,000 in youraccount?

EXERCISE 4 (5 pts.): TOXIC CHEMICAL DEGRADATION IN THE ENVIRONMENT

1,000 kilograms of toxic chemical W are discovered at a waste dump at the beginning of day 1. This would normally be classified as a waste management disaster, but environmental scientistsknow that chemical W degrades into chemical X at the rate of 34.0 percent per day. ChemicalX degrades in turn to chemical Y at a rate of 15.0 percent per day, and chemical Y degradesinto chemical Z at a rate of 27.0 percent per day. Thankfully, chemical Z is no longer toxic.

It does not degrade

Question 1:

Question 2: Question 3: Question 4:

any further, and simply accumulates in the environment.

Prepare a plot showing the daily variation of the amount of chemicals W, X, Y and Z measured at the waste dump over a period of 30 days (that is, from the beginning of day 1 to the beginning of day 31). Insert the MATLAB command legend(W,X,Y,Z) to add a legend to the plot.

What are the final amounts (in kilograms) of chemicals W, X, Y and Z measured at the waste dump at the beginning of day 31? Add these values together to show that 1,000 kg remains. Review your plot and estimate graphically on approximately which daydoes the peak in concentration of X occur at the waste dump? (Do NOT do this inside your MATLAB code.)

Assuming that the concentration of Y must fall below 75 kilograms at thewaste dump before environmental scientists will declare the area safe, on which day will the scientists declare that the waste dump is safe?