12. Using nested loops, write C++ code that will print following pattern: * * * * * * Binary numbers are inconvenient because they're too long and not easy to read. Write C+ code that convers four bits binary number to decimal number Binary Decimal 1111 15 1110 14 1101 13 1100 12 1011 11 1010 10 1001 1000 0111 0110 6 0101 0100 0021 0001 14. Write a C++ code to find the approximate value of the following series for first 50 terms and find the final results. (use while or for loop) Total = 1 1 1