Need help with the bottom questions $-$

The above question is an example of which concept?

A$.$ Multiplication is implied in Excel, but must be explicit in math

B$.$ Parentheses are implied in Excel, but must be explicit in math

C$.$ Multiplication is implied in math, but must be explicit in Excel

D$.$ Parentheses are implied in math, but must be explicit in Excel

Take a look at the expression to the left. What is the proper syntax when typing this into Excel?

A$.(((1+$ r$)^$n $-1)/$ r$)$

B$.((1+$ r$^$n $-1)/$ r$)$

C$.1+$ r$^$n $-1/$ r

D$.(((1+$ r$^$n$)-1)/$ r$)$

The above question is an example of which concept?

A$.$ Multiplication is implied in Excel, but must be explicit in math

B$.$ Parentheses are implied in Excel, but must be explicit in math

C$.$ Multiplication is implied in math, but must be explicit in Excel

D$.$ Parentheses are implied in math, but must be explicit in Excel

When replicating an expression such as $""$PV$(1+$r$)""$ in Excel, what is the proper syntax to put in the formula bar?

A$.$ PV$(1+$r$)$

B$.$ PV $*(1+$r$)$

C$.$ PV $^(1+$r$)$

D$.$ A and B are both acceptable