2. [5 points] Which of the following are illegal variable names. Briefly, in short sentences, describe why it is an illegal variable name. (a) March_2021 (b) First&Last (c) 4_times (d) month+year (e) _sales2021 3. [20 points] The following C++ program contains some syntax errors and will not compile. Find the errors and describe in short sentences why each is an error and what should be the correct statement. Highlight the incorrect lines and sentences with Yellow color. NOTE: Refer to the line numbers when describing the errors. Line # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 include ; using namespace std; int main(); } int length, $width, area; cout > length cout >> "Enter the width of the rectangle:; cin