tom’s estate includes the following assets 1- 50% shares in racehorse valued 150k 2- cash winnings o betting racehorsing of 40k 3-his main residence valued at 875k which has outstanding repayment mortagage of 500k. what is the net value to be included in tom’s chargeable death estate ? available ans options given are 0,40k,150k,200k,375k,700k,875k