Significant figures and it calculation

Indicate how many significant figures there are in each of the following measured values.

$\backslash$table$[[246\mathrm{.}32,,1\mathrm{.}008,,700000,],[107\mathrm{.}854,,0\mathrm{.}00340,,350\mathrm{.}670,],[100\mathrm{.}3,,14\mathrm{.}600,,1\mathrm{.}0000,],[0\mathrm{.}678,,0\mathrm{.}0001,,320001,]]$

Calculate the answers to the appropriate number of significant figures.

$\backslash$table$[[32\mathrm{.}567,246\mathrm{.}24,658\mathrm{.}0],[135\mathrm{.}0,238\mathrm{.}278,23\mathrm{.}5478],[+1\mathrm{.}4567,+98\mathrm{.}3,+1345\mathrm{.}29]]$

Add according to significant figures:

a$)16\mathrm{.}5+8+4\mathrm{.}37=$

b$)13\mathrm{.}25+10\mathrm{.}00+9\mathrm{.}6=$

c$)0\mathrm{.}0853+0\mathrm{.}0547+0\mathrm{.}0370+0\mathrm{.}00387=$

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