Riddle

RIDDLE EXTENSIONS: 1. EXPAND PROMPT TO »NUMBER i OF n:«. 2. PRINT THE ARRAY IN REVERSE ORDER 3. PRINT THE ARRAY IN BOTH ORDERS (3-COLUMN LAYOUT: 1ST COLUMN: PLACE NUMBER (INDEX) i, 2ND COLUMN: iTH VALUE IN INPUT ORDER, 3RD COLUMN: iTH VALUE IN REVERSE ORDER) 4. CHANGE ARRAY TO A FLOATING POINT ARRAY WITH OUTPUT OF DESCRIPTIVE STATISTICS (SUM OF VALUES, MEAN, VARIANCE...)