PLEASE WRITE THE CODE IN PYTHON FOR ALL QUESTIONS :$)$

String concatenation $I$

Given these strings: $s1=$ 'abcd'

s$2=$ 'efgh'

Create a new string composed of the first string followed by $($concatenated with$)$ the second.

String$/$Character Repeating J$.$

Create a single string containing $5$ copies of the string 'abc'. Use the multiplication operator to create a "line" of $50$ dashes.

String Cases $J.$

Convert a string to all upper case.

backslash character II$.$

Create a string that contains a backslash character using both plain literal string and a raw string.