Answer in Python: 1. Write code that prints a greeting in the following format: Hi, xxx! where xxx is the name of a person stored in the variable name. Assume that the name variable has been initialized. 2.  Concatenate Strings Write code that concatenates the character strings in str1 and str2, separated by a space, and assigns the result to a variable named joined. Assume that both string variables have been initialized.   3.  Write code that deducts the value stored in down_payment from the value in total and stores the result in balance_due. Assume the values of total and down_payment have already been set.

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Concept of memory addresses in pointers

The concept of pointers in high-level languages was introduced in C programming. Pointers are simply the variables that are used to store memory addresses of another variable. These special variables are generally used in the languages such as C Programming and C++ Programming, where it allows the programmer to work more deeply with memory and its addresses.