rounding code snippets in matlab

in the floating point number system f=[a=2,k−=−4,k+=4,t=6] the normalized, regularly rounded representation of 0.435 is: in matlab

in the floating point number system f=[a=2,k−=−5,k+=5,t=5] the normalized, regularly rounded representation of 0.209 in matlab

in the floating point number system f=[a=2,k−=−6,k+=6,t=5] the normalized, regularly rounded representation of 0.654 is: in matlab