MATLAB: Creating a Filter and applying it

filterMATLAB

hey, so i need to apply my designed filter onto an input using filter() . but i dont know how to get the b and a values.
this is the filter that i need
d = fdesign.isinclp('N,Fp,Fst',50,.4,.5);
Hd = design(d,'SincFrequencyFactor',0.25,'SincPower',16,'SystemObject',…
true);
how do i apply this to my input wave