please explain

Find the APR, or stated rate, in each of the following cases (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.): Stated Rate (APR) % Number of Times Compounded Semiannually Monthly Weekly Infinite Effective Rate (EAR) 11.6% 12.5 10.2 13.9 BAII Plus His Texas INSTRUMENTS BUSINESS ANALYST SET DEL QUIT CPT INS 1 ENTER 1 ONOFF 2ND XP/Y N CF PY I/Y NPV AMORT PV IRR BGN PMT CLR TVM FV RAND K % HYP 1/X TAN BOND X! INV ex LN ROUND STO nPr VX SIN ( DATA 7 DEPR 4 DATE 1 MEM 0 COS ) STAT 8 4% 5 ICONV 2 FORMAT ner 9 BRKEVN 6 PROFIT 3 RESET +1 - RCL CLR WORK CELC ANS