21.
A man used to rob the computers and He is active only for quarter of a year. He robs three computers Vayu, Tejas and Agni. January was unfortunate month for Tejas. Vayu was stolen in March. Now he used three tools Pliers, Screwdriver and Hook to rob all the parts from the computer and Make His own computer. He Rob Monitor from Tejas but Does not use hook. He robs Printer from Vayu and Use Pliers. And from Third Computer he robs Keyboard.

i) In which month was Agni stolen?
ii) Which tool was used for Tejas?