You may load the data into MATLAB with the command load toxic.csv. The data will then be in an array called toxic. The column information represents:

Column 1: Year AD

Column 2: Cadmium (nanograms per gram)

Column 3: Lead (nanograms per gram)

Column 4: Thallium (nanograms per gram)

ALLOWED SYNTAX: Complete the following (1) WITHthe use of for loopsand conditional blocks[i.e. if-elseif...else-end]; (2) you may NOT use any syntax requiring the dot operator; (3) you may use relational operators on scalars but you may NOTuse them on arrays. (Relational operatorsinclude: <, >, <=, >=, ==, ~=) (4) You may reuse theyears that were found using the find function in Section 1.

1.How many years during the period of this data set have a lead concentration greater than 0.2 ng/g?

2.For what percentage of the years during the 1800s (1800-1899) is the lead concentration greater than 0.01 ng/g?

3.What is the most recent year during which lead is greater than 100times the concentration of cadmium?Whatis the concentration of Pb that year?

4.For which year during the 1900s (1900-1999) did cadmium contribute its largest fraction to the total heavy metal concentration (i.e., year with largest Cd/(Pb+Cd+Th))?What is that value?(hint: help max)

5.[Up to 2pt bonus]During which decades (i.e, 1900-1909, 1910-1919, etc.) of the 1900s did lead concentration exceed 0.3 (ng/g)?