Short answer:
5. Variable type and identifier.
6. Some languages assign a default value as 0 to uninitialized variables. In many languages, uninitialized variables hold unkown values.
Algorithm Workbench
3. a. Adds 2 to a and stores the result in b
Set b= 2 +a
b. Multiplies b times 4 and stores the result in a set a= b*4
c. Divides a by 3.14 and stores the result in b set b= 3.14/b
d. Subtracts 8 from b and stored the result in a set a= b-8
4.
a. set result= x+y= 4+8
b. set result=z*2= 2*2
c. set result= y/x= 8/4 set result= y-z= 8-2
5. Floating-point variable cost
6. Initialize the variable with the value 0.
Declare Real price=53.85
Display "the original price."
Input item original price
Display "price"
7. Count:=27
8. Set total=10+14
9. Declare Integer downPayment
Declare Integer Total
Declare Integer Due
10. Dim subtotal As Double = 0 totalfee = subtotal * 0.15

Programming Exercise:
6. Sales Tax
Design a program that will ask the user to enter the amount of a purchase. The program should then compute the state and county tax. Assume the state sales tax is 4 percent (.04) and the county tax is 2 percent (.02). The program should display the amount of the purchase, the state sales tax, the county sales tax, the total sales tax, and the total of the sale (which is the sum of the amount of the purchase plus the total sales tax). int main
{ double amtPurch double stateTax double countryTax cout << "How much did you purchase?"; cin >> amtPurch; stateTax = STATE_SALES_TAX * amtPurch; countyTax= COUNTRY_SALES_TAX * amtPurch; cout<< "State sales tax:\n"<<stateTax<<]n << "Country sales tax: \n" << countryTax; }

8. Tip, Tax and Total
Design a program that calculates the amount of a meal purchased at a restrurant. The program should ask the user to enter the charge for the food, and