Please help me answer completely. I have to choose the correct answers for each question and I need to give an explanation for each question. Thanks a lot for your help!

Exercise- What data type would you use for the following.. The number of K-6 students in each class The population of major metropolitan areas A business that sells widgets and records the net effect on inventory or the number of items sold minus the returns The TDS (total dissolved solids) in water measured in ppm (parts per million) . Someone who is setting up an aquaponics business and wants to record the dissolved oxygen ppm and the ph level of the soil . The letter grade on an assignment The number of months an employee works before resignation or retirement . . The number of days an employee works before resignation or retirement The conversion of rgb(204, 204, 204) TO #CCCCCC or vice versa Variable Type Character Unsigned character Integer Short Integer Long Integer Unsigned Integer Unsigned Short integer Unsigned Long Integer Float Double Long Double Keyword char unsigned char int short int long int unsigned int unsigned short int unsigned long int float double long double Bytes Required Range 128 to 127 0 to 255 -32768 to 32767 32768 to 32767 -2,147,483,648 to 2,147,438,647 0 to 65535 0 to 65535 0 to 4,294,967,295 1.2E-38 to 2.2E-308 to 3.4E-4932 to 1.1E+4932 2 4 4 10