What is the regular expression for a grade that can be $0\mathrm{.}0,$ or in the range $0\mathrm{.}74\mathrm{.}0$ That is$,$ it must

match:

a$.$ The numeral $0,$ followed by a period, followed by a zero

b$.$ Or the numeral $0,$ followed by a period, followed by any numeral in the set $7,8,9$

c$.$ Or the numerals $1-3$ followed by a period, followed by any numeral

d$.$ Or the numeral $4,$ followed by a period, followed by the numeral $0$

Note $-$ Do not enter any space characters inside the regular expression.