fIf the input is negative, make numItemsPointer be null. Otherwise, make numItemsPointer point to numItems and multiply the value to which numItemsPointer points by $10.$ Ex: If the user enters $99,$ the output should be:

Items: $990$Given variables letter, region, and amount, declare and assign the following pointers:

character pointer letterPointer is assigned with the address of letter.

integer pointer regionPointer is assigned with the address of region.

double pointer amountPointer is assigned with the address of amount.

Ex: If the input is B $518\mathrm{.}5,$ then the output is:

Oil grade: B

Region of import: $5$

Quantity: $18\mathrm{.}5$