For an experiment in botany, two different plants, plant A and B, were grown under similar laboratory conditions. Their heights were measured at the end of each week for three weeks. The results are shown by the line graph given below :

Study the above line graph carefully and answer the questions given below:
`(i)` How high was plant A after `(a) 2` weeks `(b) 3` weeks ?
`(ii)` How high was plant B after `(a) 2` weeks `(b) 3` weeks?
`(iii)` How much did plant A grow during the `3rd` week?
`(iv)` How much did plant B grow from the end of the `2nd` week to the end of the `3rd` week ?
`(v)` During which week did plant A grow most ?
`(vi)` During which week did plant B grow least ?
`(vii)` Were the two plants of the same height during any week shown here ? Specify.

Answer

`(i) (a) 7cm` `(b) 9cm` `(ii) (a) 7cm` `(b) 10cm` `(iii) 2cm` `(iv) 3cm` `(v) 2nd` week `(vi)1st` week `(vii)` At the end of `2nd ` week