$2\mathrm{.}30$ Write the following Boolean expressions in sum of products form:

$(w+x+y)(x^{\text{'}}+y^{\text{'}}+z^{\text{'}})$

$2\mathrm{.}3.$ Write the following Boolean expression in product of sums form:

$a{c}^{\text{'}}+ab{c}^{\text{'}}+a^{\text{'}}bc$